fix: normalize path strings when updating field values (#14649)

* fix: normalize path strings when updating field values

* fix

Author: Rich-Harris

.changeset/smart-pianos-lie.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+fix: normalize path strings when updating field values

packages/kit/src/runtime/client/remote-functions/form.svelte.js

@@ -416,6 +416,8 @@ export function form(id) {
 						);
 					}
 
+					name = name.replace(/^[nb]:/, '');
+
 					versions[name] ??= 0;
 					versions[name] += 1;