Description

When reloading an editor, RTC seems to incorrectly sync navigation block state.

Previously saved changes to a navigation menu are removed and the block is reverted to an earlier stale version. When inspecting the network activity, I can see the bug coincides with a call to the wp-sync/v1/updates?_locale=user endpoint. The requests to wp/v2/navigation to GET the navigation menu do return the correct data, but the sync seems 'undo' the data.

This may be hard to reproduce or not, but I seem to encounter it fairly regularly.

Possibly related to #76784

Step-by-step reproduction instructions

1. Insert a navigation block into a draft post
2. Make some changes (e.g. add some links to the nav block)
3. Save changes
4. Reload the post
5. Observe the nav block initially shows the correct changes, but then seems to revert back to a stale earlier version

Screenshots, screen recording, code snippet

Video initially shows the incorrect 'stale' menu, after reloading the correct menu state briefly appears, but is then replaced by the 'stale' menu again.

Environment info

No response

Please confirm that you have searched existing issues in the repo.

• Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

• Yes

Please confirm which theme type you used for testing.

• Block
• Classic
• Hybrid (e.g. classic with theme.json)
• Not sure