https://bugs.kde.org/show_bug.cgi?id=480935

--- Comment #11 from a...@stronzi.org ---
> I *can* reproduce the bug if the video is playing full screen on either of
> the other displays (laptop or monitor).
> 
> Observed the clock to see if it changed size - yes
> Observed the color picker widget to see if it changed transparency - yes
> The symptoms are identical to the original report.

Yeah sorry, I forgot to mention that I'm using a dual monitor setup, so the bug
happens when mpv is open fullscreen on the secondary monitor and the panel is
on primary monitor. It is exatcly as you wrote, I confirm.

BUT I noticed another thing today, and I think it could be related (not 100%
sure tho).
When mpv is fullscreen on the secondary monitor and the bug happens, another
thing that happen is that the window shadows disappear from primary monitor.
My compositor is set to "Allow applications to block compositing" so I assume
that mpv is blocking it.
Now I think that this is intended, so it might be normal for the shadows to
disappear *only* when mpv is fullscreen (is it?), but I just noticed that when
I close mpv and the shadows come back, that's the moment when something goes
weird, the font come back to normal, the transparency of the color picker come
back to opaque and sometimes the whole panel turns to transparent instead of
opaque.

So I think that it could be the compositor turning on and off that triggers the
bug, and not mpv itself.
I'm not sure tho, I'm just making assumptions here, trying to link the
behaviors I'm observing. To be honest I'm not entirely understanding why mpv
should need to block the compositor when in fullscreen, but not in windowed
mode, so I don't know. I just hope this can be useful.

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