Created attachment 143121 [details]
The open app
After the Plasma 5.23 update, there is an app that consists of about a 20px by 1px line in the top left corner, that has the name 'Plasma'.
STEPS TO REPRODUCE
1. Use the desktop for a while, with or without the compositor enabled.
There is a taskbar entry for 'Plasma', and on enlarging the line on the top left corner, it's a blank app. See attached screenshot in next message.
This should not be there
Operating System: KDE neon 5.23
KDE Plasma Version: 5.23.2
KDE Frameworks Version: 5.87.0
Qt Version: 5.15.3
Kernel Version: 5.11.0-38-generic (64-bit)
Graphics Platform: X11
Processors: 4 × Intel® Core™ i5-7200U CPU @ 2.50GHz
Memory: 7.5 GiB of RAM
Graphics Processor: Mesa Intel® HD Graphics 620
Created attachment 143122 [details]
When it's not already visible, can you make it reliably appear when you switch activities?
(In reply to Nate Graham from comment #2)
> When it's not already visible, can you make it reliably appear when you
> switch activities?
Not reliably. It does seem to pop up only when switching activities/virtual desktops, but it doesn't appear every time.
(In reply to strangequark from comment #3)
> (In reply to Nate Graham from comment #2)
> > When it's not already visible, can you make it reliably appear when you
> > switch activities?
> Not reliably. It does seem to pop up only when switching activities/virtual
> desktops, but it doesn't appear every time.
(I am not sure about the virtual desktop part, I switch activities a lot more frequently than virtual desktops)
Thanks for the info. Seems like the same thing as Bug 443968.
*** This bug has been marked as a duplicate of bug 443968 ***