Safari: Site editor block outlines remain after block is deselected

[kjellr]

Description

In Safari, clicking around the site editor sometimes results in a buildup of gray block outlines. They appear when a block has been selected, and some of them don't seem to go away until the page is refreshed.

I've only experienced this issue in Safari.

GIF

Note the buildup of gray block outlines in the Navigation block below:

WordPress information

• WordPress 5.6.2
• Gutenberg 10.1.1

Device information

• Device: Desktop
• Operating system: Mac OS 11.2.2
• Browser: Safari 14.0.3

[jasmussen]

I've seen this also. @ellatrix do you have any insights into what might cause this? I'm seeing also the sibling inserter sometimes lingering, though I don't know if that's related.

I see this also in Chrome, by the way.

[ellatrix]

Should be fixed after #30995. Please reopen if that's not the case :)