[wp-trac] [WordPress Trac] #42172: Customize: Mobile preview button position moves when opening panel and falls out of place in Safari 375px viewport

[WordPress Trac]

#42172: Customize: Mobile preview button position moves when opening panel and
falls out of place in Safari 375px viewport
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 Reporter:  westonruter   |       Owner:  sayedwp
     Type:  defect (bug)  |      Status:  assigned
 Priority:  normal        |   Milestone:  4.9
Component:  Customize     |     Version:
 Severity:  normal        |  Resolution:
 Keywords:  needs-patch   |     Focuses:
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Comment (by Mahvash Fatima):

 I think this issue started after we tried to add animation to those header
 buttons by overriding `position: absolute` . I saw one more issue with
 animation that the preview button was going away diagonally. Please see if
 my patch fixes the issue.

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Ticket URL: <https://core.trac.wordpress.org/ticket/42172#comment:4>
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