I am running Mixx 2.3.1-8-gf2ec8a281f on 64-bit OpenSuse Tumbleweed GNU/Linux with Wayland 1.19.0, Qt 5.15.2, Linux kernel 5.14.6, Mesa 21.2.3, KDE Frameworks 5.86.0, KDE Plasma 5.22.5. The graphics card is AMD Radeon RX 480 8GB. The screen has a resolution of resolution of 3840x2160.
Spinny in the middle is never shown, just a black square (or what was previously shown in that place, e.g. if you open and close skin settings side panel).
The waveform RGB also shows just black rectangles with all the GL options. If I use the RGB setting without GL it does show the waveform but there is some region in the lower quarter of each waveform which does not move when some deck is playing and waveform moving. Sometimes the waveform just stops updating entirely when switching to other windows and coming back to Mixxx.
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