[wp-trac] [WordPress Trac] #57995: Popup flickering in Firefox

[WordPress Trac]

#57995: Popup flickering in Firefox
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 Reporter:  robehr79      |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  6.2.1
Component:  TinyMCE       |     Version:  6.1.1
 Severity:  major         |  Resolution:
 Keywords:  needs-patch   |     Focuses:  javascript, administration
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Comment (by kelvinballoo):

 So I want to expand on this more.

 I've reproduced the issue with the classic block on a few browsers on PHP
 7.4 , WordPress 6.1.1:
 1. Create post
 2. Add 'Classic' block (did not have tinyMCE)
 3. Add text under classic block and assign URL to it.

 Here are my observations:
 -> Safari (Version 16.3 (17614.4.6.11.6, 17614)) - Works perfect.

 -> Chrome (Version 111.0.5563.146 (Official Build) (x86_64)) - There are
 some flickers that happened when I tried to select the inserted URL (URL
 is longer than the input field) but it's still workable. The flicker
 should be fixed though.

 -> Firefox (111.0.1 (64 bit))- This is the most problematic.
 - Not only the flicker is much more, you hardly can do anything when you
 have a long URL. Sometimes the URL popup won't even appear.
 - Short URLs are fine but sometimes the link popup won't disappear after
 clicking elsewhere on the page.
 - If you have a scenario with 2 links, one which is a short URL which was
 working fine...and if you insert another long URL somewhere else on the
 page, this will affect the experience for the short URL too.

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Ticket URL: <https://core.trac.wordpress.org/ticket/57995#comment:2>
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