During the last couple of days I have been setting a Tumbleweed installation
with the transactional updates. At the beginning, when I had set up KMail for
the first time, I was able to read my emails. However, since yesterday the
message windows present me blanks. I am able to read the raw contents, so
problem is strictly related to the display pipeline.
The only event I can remotely connect to the change for the worse is a recent
update of 3 packages. I never bothered to check what got updated. Between that
and discovery of the bug I had performed multiple changes to the system and
used transactional-update cleanup to see how it looks.
My other computer is currently in repair, and on Leap anyway, so I am not able
to confirm the issue.