diff --git a/src/UI/Base/LoginToggle.svelte b/src/UI/Base/LoginToggle.svelte
index 93df7e84b..8aa8e7fcf 100644
--- a/src/UI/Base/LoginToggle.svelte
+++ b/src/UI/Base/LoginToggle.svelte
@@ -28,7 +28,8 @@
 </script>
 
 {#if $badge}
-  {#if !ignoreLoading && $loadingStatus === "loading"}
+  <slot/>
+ <!-- {#if !ignoreLoading && $loadingStatus === "loading"}
     <slot name="loading">
       <Loading />
     </slot>
@@ -41,5 +42,5 @@
     <slot />
   {:else if $loadingStatus === "not-attempted"}
     <slot name="not-logged-in" />
-  {/if}
+  {/if} -->
 {/if}
diff --git a/src/UI/Popup/LoginButton.ts b/src/UI/Popup/LoginButton.ts
index 7e7f585cc..d47f22b13 100644
--- a/src/UI/Popup/LoginButton.ts
+++ b/src/UI/Popup/LoginButton.ts
@@ -88,7 +88,7 @@ export class LoginToggle extends VariableUiElement {
                     )
                 },
                 [state.featureSwitchUserbadge, state.osmConnection?.apiIsOnline]
-            ) ?? new ImmutableStore(el) //
+            ) ?? new ImmutableStore(el)
         )
     }
 }
diff --git a/src/UI/Popup/TagRendering/TagRenderingEditable.svelte b/src/UI/Popup/TagRendering/TagRenderingEditable.svelte
index 11c4646a7..6dfb260ab 100644
--- a/src/UI/Popup/TagRendering/TagRenderingEditable.svelte
+++ b/src/UI/Popup/TagRendering/TagRenderingEditable.svelte
@@ -16,7 +16,7 @@
   export let tags: UIEventSource<Record<string, string>>
   export let selectedElement: Feature | undefined
   export let state: SpecialVisualizationState
-  export let layer: LayerConfig
+  export let layer: LayerConfig = undefined
 
   export let editingEnabled : Store<boolean> | undefined = state?.featureSwitchUserbadge
 
diff --git a/src/UI/SpecialVisualizations.ts b/src/UI/SpecialVisualizations.ts
index 31509b0b5..262a4fa6b 100644
--- a/src/UI/SpecialVisualizations.ts
+++ b/src/UI/SpecialVisualizations.ts
@@ -986,6 +986,9 @@ export default class SpecialVisualizations {
                 constr: (state, tagsSource) =>
                     new VariableUiElement(
                         tagsSource.map((tags) => {
+                            if (state.layout === undefined) {
+                                return "<feature title>"
+                            }
                             const layer = state.layout.getMatchingLayer(tags)
                             const title = layer?.title?.GetRenderValue(tags)
                             if (title === undefined) {
@@ -1335,10 +1338,10 @@ export default class SpecialVisualizations {
                         tagSource.map((tags) => {
                             const v = tags[argument[0] ?? "value"]
                             try {
-                                const tr = JSON.parse(v)
+                                const tr = typeof v === "string" ? JSON.parse(v) : v
                                 return new Translation(tr).SetClass("font-bold")
                             } catch (e) {
-                                return v
+                                return JSON.stringify(v)
                             }
                         })
                     )
diff --git a/src/UI/Studio/EditLayerState.ts b/src/UI/Studio/EditLayerState.ts
index dc15a1682..82abb0435 100644
--- a/src/UI/Studio/EditLayerState.ts
+++ b/src/UI/Studio/EditLayerState.ts
@@ -15,6 +15,7 @@ import { AllSharedLayers } from "../../Customizations/AllSharedLayers"
 import { QuestionableTagRenderingConfigJson } from "../../Models/ThemeConfig/Json/QuestionableTagRenderingConfigJson"
 import { TagUtils } from "../../Logic/Tags/TagUtils"
 import StudioServer from "./StudioServer"
+import { Utils } from "../../Utils"
 
 /**
  * Sends changes back to the server
@@ -72,9 +73,9 @@ export default class EditLayerState {
         }
         this.messages = this.configuration.mapD((config) => {
             const context = ConversionContext.construct([], ["prepare"])
-
-            for (let i = 0; i < (config.tagRenderings ?? []).length; i++) {
-                const tr = config.tagRenderings[i]
+            const trs = Utils.NoNull(config.tagRenderings ?? [])
+            for (let i = 0; i < trs.length; i++) {
+                const tr = trs[i]
                 if (typeof tr === "string") {
                     continue
                 }
@@ -116,11 +117,19 @@ export default class EditLayerState {
         return entry
     }
 
-    public getStoreFor(path: ReadonlyArray<string | number>): UIEventSource<any | undefined> {
+    private readonly _stores = new Map<string, UIEventSource<any>>()
+    public getStoreFor<T>(path: ReadonlyArray<string | number>): UIEventSource<T | undefined> {
+        const key = path.join(".")
+
+        // TODO check if this gives problems when changing the order of e.g. mappings and questions
+        if (this._stores.has(key)) {
+            return this._stores.get(key)
+        }
         const store = new UIEventSource<any>(this.getCurrentValueFor(path))
         store.addCallback((v) => {
             this.setValueAt(path, v)
         })
+        this._stores.set(key, store)
         return store
     }
 
@@ -170,19 +179,24 @@ export default class EditLayerState {
 
     public setValueAt(path: ReadonlyArray<string | number>, v: any) {
         let entry = this.configuration.data
+        const isUndefined =
+            v !== undefined &&
+            v !== null &&
+            v !== "" &&
+            !(typeof v === "object" && Object.keys({}).length === 0)
+
         for (let i = 0; i < path.length - 1; i++) {
             const breadcrumb = path[i]
             if (entry[breadcrumb] === undefined) {
                 entry[breadcrumb] = typeof path[i + 1] === "number" ? [] : {}
             }
             entry = entry[breadcrumb]
+            if (entry === undefined && isUndefined) {
+                // Nothing to do anymore: we cannot traverse the object, but don't have to set something anyway
+                return
+            }
         }
-        if (
-            v !== undefined &&
-            v !== null &&
-            v !== "" &&
-            !(typeof v === "object" && Object.keys({}).length === 0)
-        ) {
+        if (isUndefined) {
             entry[path.at(-1)] = v
         } else if (entry) {
             delete entry[path.at(-1)]
diff --git a/src/UI/Studio/SchemaBasedField.svelte b/src/UI/Studio/SchemaBasedField.svelte
index 573e57bd5..272d8389f 100644
--- a/src/UI/Studio/SchemaBasedField.svelte
+++ b/src/UI/Studio/SchemaBasedField.svelte
@@ -29,7 +29,7 @@
 
     const configJson: QuestionableTagRenderingConfigJson = {
         id: path.join("_"),
-        render: schema.type === "boolean" ? undefined : ((schema.hints.inline ?? schema.path.at(-1) )+ ": <b>{translated(value)}</b>"),
+        render: schema.type === "boolean" ? undefined : ((schema.hints.inline ?? schema.path.at(-1) )+ ": translated value: <b>{translated(value)}</b>"),
         question: schema.hints.question,
         questionHint: nmd(schema.description),
         freeform: schema.type === "boolean" ? undefined : {
@@ -100,7 +100,9 @@
     try {
         onDestroy(state.register(path, tags.map(tgs => {
             const v = tgs["value"];
-            console.log("Registering",path,"setting value to", v)
+            if(v !== ""){
+                console.log("Registering",path,"setting value to", v)
+            }
             if(typeof v !== "string"){
                 return v
             }
diff --git a/src/UI/Studio/SchemaBasedMultiType.svelte b/src/UI/Studio/SchemaBasedMultiType.svelte
index d712edd66..a9df2a859 100644
--- a/src/UI/Studio/SchemaBasedMultiType.svelte
+++ b/src/UI/Studio/SchemaBasedMultiType.svelte
@@ -113,7 +113,6 @@
 
         for (const requiredAttribute of type.required) {
           if (existingValue[requiredAttribute] === undefined) {
-            console.log(path.join("."), " does not have required field", requiredAttribute, " so it cannot be type ", type);
             // The 'existingValue' does _not_ have this required attribute, so it cannot be of this type
             continue outer;
           }
@@ -128,7 +127,6 @@
     }
     possibleTypes.sort((a, b) => b.optionalMatches - a.optionalMatches);
     possibleTypes.sort((a, b) => b.matchingPropertiesCount - a.matchingPropertiesCount);
-    console.log("Possible types are", possibleTypes)
     if (possibleTypes.length > 0) {
       chosenOption = possibleTypes[0].index
       tags.setData({ chosen_type_index: "" + chosenOption});
@@ -157,27 +155,23 @@
   let subSchemas: ConfigMeta[] = [];
 
   let subpath = path;
-  console.log("Initial chosen option for",path.join("."),"is", chosenOption);
+  const store = state.getStoreFor(path)
   onDestroy(tags.addCallbackAndRun(tags => {
     if (tags["value"] !== undefined && tags["value"] !== "") {
       chosenOption = undefined;
-      console.log("Resetting chosenOption as `value` is present in the tags:", tags["value"])
       return;
     }
     const oldOption = chosenOption;
-    console.log("Updating chosenOption based on", tags, oldOption)
     chosenOption = tags["chosen_type_index"] ? Number(tags["chosen_type_index"]) : defaultOption;
     const type = schema.type[chosenOption];
     if (chosenOption !== oldOption) {
       // Reset the values beneath
       subSchemas = [];
       const o = state.getCurrentValueFor(path) ?? {};
-      console.log({ o });
       for (const key of type?.required ?? []) {
-        console.log(key);
         o[key] ??= {};
       }
-      state.setValueAt(path, o);
+      store.setData(o)
     }
     if (!type) {
       return;
@@ -187,7 +181,6 @@
     if (type["$ref"] === "#/definitions/Record<string,string>") {
       // The subtype is a translation object
       const schema = state.getTranslationAt(cleanPath);
-      console.log("Got a translation,", schema);
       subSchemas.push(schema);
       subpath = path.slice(0, path.length - 2);
       return;
diff --git a/src/UI/Studio/TagRenderingInput.svelte b/src/UI/Studio/TagRenderingInput.svelte
index 31c7274bb..1559e8997 100644
--- a/src/UI/Studio/TagRenderingInput.svelte
+++ b/src/UI/Studio/TagRenderingInput.svelte
@@ -44,9 +44,9 @@ const configBuiltin = new TagRenderingConfig(<QuestionableTagRenderingConfigJson
 
 
 const tags = new UIEventSource({ value });
-
+const store = state.getStoreFor(path)
 tags.addCallbackAndRunD(tgs => {
-  state.setValueAt(path, tgs["value"]);
+  store.setData(tgs["value"])
 });
 
 let mappings: UIEventSource<MappingConfigJson[]> = state.getStoreFor([...path, "mappings"]);
diff --git a/src/UI/StudioGUI.svelte b/src/UI/StudioGUI.svelte
index ee4d3536a..cfbfe5fde 100644
--- a/src/UI/StudioGUI.svelte
+++ b/src/UI/StudioGUI.svelte
@@ -17,7 +17,7 @@
   import layerSchemaRaw from "../../src/assets/schemas/layerconfigmeta.json";
   import If from "./Base/If.svelte";
 
-  export let studioUrl = /* "https://studio.mapcomplete.org"; /*/ "http://127.0.0.1:1235"; //*/
+  export let studioUrl = window.location.hostname === "127.0.0.1" ? "http://127.0.0.1:1235" : "https://studio.mapcomplete.org"; 
   const studio = new StudioServer(studioUrl);
   let layersWithErr = UIEventSource.FromPromiseWithErr(studio.fetchLayerOverview());
   let layers = layersWithErr.mapD(l => l.success);