Hello,
I am affected by this bug as well and I think as more people migrate to
Bullseye, they will be affected too.
For me, the system tray is losing icons. I usually have 3 programs
supposed to be shown in there: kalarm, psi and kteatime. Sometimes all 3
of them are shown for a while but sometimes the tray doesn't even pick
them up and shows only two (kalarm being the one affected the most and
not showing most of the time.)
After some time of using the PC more icons gradually disappear, psi
being the second most affected one. Since those programs are supposed to
be minimized to tray most of the time, the only way to access them after
this happens is restarting them (luckily, both programs detect their
previous instance and make it appear - if that wasn't the case, only way
to gain access to the program would be killing it from console and
restarting it altogether)
When this happens, the following can be observed in system tray
settings: right click panel - menu item "Panel" - "Panel Preferences..."
- "Items" tab - double click "Status Tray Plugin". In the "Known Items"
area, there are items for each application and those affected by this
show light grey icon with darker gray exclamation mark in a triangle
instead of their own icon - not sure how relevant this is though.
There is also a bug that affects kteatime. When it shows an "tea is
ready" event, its icon changes to a light bulb and never reverts back,
making it non-usable since there is no possibility to distinguish last
event from a new one. This is reported at
https://gitlab.xfce.org/xfce/xfce4-panel/-/issues/340 . I am not sure if
this bug is related to the previous one.
I believe - if anyone has the time - that this bug should get some
attention because, in my opinion, it has significant impact on usability
of Xfce as a whole. If there are some patches to test and the
xfce4-panel package can be rebuilt from source using apt-get source and
dpkg-buildpackage, I should be able to provide testing and feedback.
Thanks