Post editor: Missing Back button to go back from template editing

[afercia]

Description

Discovered while looing into #56150 as I wanted to check if a similar problem occurs in the Post editor as well.

This appears to be a regression in trunk. I think it's a side effect of #56150
Cc @jeryj

Step-by-step reproduction instructions

• Test with WordPress 6.4
• Edit a post.
• In the setting panel, click the current template. A popover open. Click 'Edit template'. Screenshot:

• The editor switches to a 'Edit template' mode.
• Observe in the top bar there is a 'Back' button to switch back to the normal Post editor mode.
• Observe that whatever you do, the 'Back' button stays there. Screenshot:

• Test with latest Gutenberg trunk.
• Repeat the steps above.
• Observe that as soon as you click something within the editor, the Back button and the Command center button disappeaer. Screenshot:

• At this point, I'm not sure there is a way to switch back to the normal view other than refreshing the page.

Screenshots, screen recording, code snippet

No response

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

[jeryj]

Thanks for catching this and explaining the issue so clearly! You were right about the cause. #56217 should address it 🤞🏻