"View Post" link while editing synced pattern leads to 404

[Drivingralle]

How to reproduce it:

• Open a new playground
• Open "Hello World" post in block editor from admin bar or post list in WP-Admin
• Disable "full screen mode"
• Insert some block(s) and convert them to a synced pattern
• (Save post)
• Enter edit mode for that synced pattern via "Edit original" in tools bar
• Click "View post" button in admin bar

I was expecting to view the "Hello World" post or that the link inside the admin bar to be hidden as long as I'm editing the synced pattern.

Here a video showing it:
​https://cloudup.com/cJS7LS3fSub

[sachinrajcp123]

# Fix: Hide 'View post' link in admin bar when editing synced patterns (wp_block) to prevent 404s.

[sachinrajcp123]

# Fix: Hide 'View post' link in admin bar when editing synced patterns (wp_block) to prevent 404s.

[sabernhardt]

I moved this report to GitHub to address it in the plugin first.
​https://github.com/WordPress/gutenberg/issues/71343

If you have anything to add, please comment there.