Safari tabs "die" and cannot be deleted
For no apparent reason sometimes tabs in a tab group become unresponsive and show no content and cannot be deleted.
This was driving me crazy, but until a fix arrives (good luck with that!) I found a way to deal with this problem:
1) Create a new tab group named "Dead Tabs"
2) Right-click on the offending tab and move it to "Dead Tabs"
This gets rid of the troublesome tab, and you will find that no tabs accumulate in "Dead Tabs"
Mac mini, macOS 12.5