Unexpected Safari Web Extension behavior on mouseover list item in popup

Info:
  • Device: MacBook Pro (16-inch, 2019)

  • macOS Version: 11.1 (20C69)

  • Safari Version: 14.0.2 (16610.3.7.1.9)

  • Xcode Version: 12.3 (12C33)

Brief:
Mouseover event doesn't work as expected when the extension is in the left side of Safari toolbar, but works well in the left side.

You can watch the video for the bug presentation:
vimeo.com/502518634

Steps to repeat:
  1. Download Chrome Read Later

  2. Run xcrun safari-web-extension-converter chrome-read-later

  3. Open Safari -> Develop -> Allow Unassigned Extensions

  4. Open chrome-read-later in Xcode and press command + R

  5. Open Safari, press Command + , check Read Later

  6. Click Read Later icon to allow it on every website

  7. Save some tabs with different urls to Read Later by pressing Alt + Shift + S, or right click the webpage and select Read Later

  8. Click the the Read Later icon to open the reading list

  9. Mouse move through the reading list, you will see the bug

10. Right Click Customize Toolbar in the header of Safari, move the Read Later icon to the right
  1. Repeat step 8-9, you'll find the bug is gone

Sorry, I made a typo:  but it works well in the right side.
Thanks for the detailed report! If you could send a bug report to https://feedbackassistant.apple.com that would be very helpful.

This is very interesting.
Hi @bweinstein

Thank you for your reply, I've sent a bug report.

https://feedbackassistant.apple.com/feedback/8976265
Jan 20, 2021 at 9:11 PM – FB8976265

Dealing with exactly the same issue. Were you able to find any workaround? Is there a way to follow the status of the issue?
Unexpected Safari Web Extension behavior on mouseover list item in popup
 
 
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