[Bug 1951625] [NEW] thunderbird does not restart after minimizing (red dot left of icon)

[Jürgen Iversen]

Public bug reported:

After interrupting a Thunderbird session by minimizing (using "-" in the
top right corner) I can't reopen the minimized Thunderbird window as all
other program icons do (and Thunderbird also did until about half a year
ago!) I can not say exactly if an update caused this defect. Maybe
Ubuntu 21.04 which I installed in April 21. Ubuntu 21.10 update did not
eliminate this. Kernel updates either (now running kernel 5.14.15.)

** Affects: thunderbird (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1951625

Title:
  thunderbird does not restart after minimizing (red dot left of icon)

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