Comment # 19 on bug 1207837 from Frerk Meyer

With kernel Linux version 6.2.1-1-default it works again deterministic.
I guess it helps to turn the external monitor on after booting, have to try
more.

I'll attach dmesg output.

Main line is after turning on the external monitor, attached via USB-C Hub
(from HP) and Displayport:
[   23.978496] [drm] DP Alt mode state on HPD: 1
[   24.108697] [drm] DM_MST: starting TM on aconnector: 000000008746628a [id:
90]
[   24.435007] [drm] Downstream port present 1, type 0
[   25.367461] [drm] crtc[0] needs mode_changed

So it seems to be fixed with 6.2.1.