With a certain mp3 file picard crashes whenever I do a right click in the lower area where tags are listed.  The traceback is pretty clear I think:

Traceback (most recent call last):
  File "/usr/lib64/python3.9/site-packages/picard/ui/metadatabox.py", line 356, in contextMenuEvent
    editable = self.tag_is_editable(tags[0])
IndexError: list index out of range
…
Local variables in innermost frame:

tags: []