Seems to be working still... Trying to update packages.

src/lib/app_components/e_app_codemirror_v5.svelte

@@ -43,8 +43,8 @@
 
     let editor_element: HTMLDivElement = $state();
     let editorView: any = $state(); // Changed to any
-
     let cm_modules: any = $state(); // To hold the dynamically loaded CodeMirror modules
+    let editor_extensions: any[] = $state([]);
 
     async function initializeCodeMirror() {
         if (!browser) return;
@@ -53,7 +53,7 @@
         if (!cm_modules) return;
 
         // Reactive declaration for extensions
-        let editor_extensions = [
+        editor_extensions = [
             // Core extensions
             cm_modules.highlightSpecialChars(),
             cm_modules.history(),
@@ -122,14 +122,11 @@
     });
 
     // Update editor content when `content` prop changes
-    run(() => {
-        if (cm_modules && editorView && editorView.state.doc.toString() !== content) {
-            editorView.setState(
-                cm_modules.EditorState.create({
-                    doc: content,
-                    extensions: editor_extensions // Use the reactive extensions
-                })
-            );
+    $effect(() => {
+        if (editorView && content !== editorView.state.doc.toString()) {
+            editorView.dispatch({
+                changes: { from: 0, to: editorView.state.doc.length, insert: content || '' }
+            });
         }
     });
 </script>