diff --git a/src/lib/components/common/RichTextInput.svelte b/src/lib/components/common/RichTextInput.svelte
index 7ddf962af4..b4b54d7b43 100644
--- a/src/lib/components/common/RichTextInput.svelte
+++ b/src/lib/components/common/RichTextInput.svelte
@@ -1,7 +1,7 @@
 <script lang="ts">
 	import { marked } from 'marked';
 	import DOMPurify from 'dompurify';
-	import equal from 'fast-deep-equal';
+	import { equalEditorJSON } from '$lib/utils/editorJson';
 	import { showCallOverlay, skills, terminalSkills } from '$lib/stores';
 
 	marked.use({
@@ -1380,7 +1380,7 @@
 		}
 
 		if (json) {
-			if (!equal(value, jsonValue)) {
+			if (!equalEditorJSON(value, jsonValue)) {
 				editor.commands.setContent(value);
 				selectTemplate();
 			}
diff --git a/src/lib/components/notes/NoteEditor.svelte b/src/lib/components/notes/NoteEditor.svelte
index 4b9a2b5d59..ac9dc63b9f 100644
--- a/src/lib/components/notes/NoteEditor.svelte
+++ b/src/lib/components/notes/NoteEditor.svelte
@@ -8,7 +8,7 @@
 
 	import { marked } from 'marked';
 	import { toast } from 'svelte-sonner';
-	import equal from 'fast-deep-equal';
+	import { equalEditorJSON } from '$lib/utils/editorJson';
 
 	import { goto, onNavigate } from '$app/navigation';
 
@@ -340,7 +340,7 @@
 	}
 
 	function areContentsEqual(a, b) {
-		return equal(a, b);
+		return equalEditorJSON(a, b);
 	}
 
 	function insertNoteVersion(note) {
diff --git a/src/lib/utils/editorJson.ts b/src/lib/utils/editorJson.ts
new file mode 100644
index 0000000000..56bc710652
--- /dev/null
+++ b/src/lib/utils/editorJson.ts
@@ -0,0 +1,31 @@
+// Editor JSON can contain ProseMirror's null-prototype attributes, which fast-deep-equal
+// cannot compare. Keep this scoped to JSON data, with reference checks and early exits.
+export function equalEditorJSON(a: unknown, b: unknown): boolean {
+	if (a === b) return true;
+	if (!a || !b || typeof a !== 'object' || typeof b !== 'object') return false;
+
+	if (Array.isArray(a)) {
+		if (!Array.isArray(b) || a.length !== b.length) return false;
+		for (let i = 0; i < a.length; i++) {
+			if (!equalEditorJSON(a[i], b[i])) return false;
+		}
+		return true;
+	}
+
+	if (Array.isArray(b)) return false;
+
+	const left = a as Record<string, unknown>;
+	const right = b as Record<string, unknown>;
+	const keys = Object.keys(left);
+	if (keys.length !== Object.keys(right).length) return false;
+
+	for (const key of keys) {
+		if (
+			!Object.prototype.hasOwnProperty.call(right, key) ||
+			!equalEditorJSON(left[key], right[key])
+		) {
+			return false;
+		}
+	}
+	return true;
+}