Description

When the following conditions are met, the sidebar reappears with animation in the post editor.

• "Show template" is enabled
• The post sidebar is enabled
• Reload your browser
• The latest Gutenberg plugin is enabled

Note that this issue is not reproducible in WordPress 6.9 Beta1, but it's possible that some parts of Gutenberg will be backported to the core in the Beta2 release.

We need to investigate the root cause to ensure this issue does not occur in 6.9 Beta2.

Step-by-step reproduction instructions

• Open a post editor.
• Enable"Show template"
• Open the post sidebar is enabled
• Reload your browser

Screenshots, screen recording, code snippet

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