Dear
@WiiM Support , I am not the OP but I have a good example which I already described in my feedback sent from WiiM app: The Dark Side Of The Moon album by Pink Floyd. It is 24 bit / 96 kHz (UltraHD) album on Amazon Music and on Qobuz as well. All tracks are the same sampling rate. Try playing track one and wait for its transition to track two. The helicopter effect on Amazon Music stutters between tracks. Same transition plays seamlessly via Qobuz, the helicopter rotates smoothly around your head, without suddenly stopping in the air, then jumping.
And scrubbing is definitely broken in this firmware, as others mentioned already. It skips to next track if you touch the slider.
Edit: Just to make it clear, I am talking about WiiM app playback, NOT about casting from other apps. I am aware that gapless casting to WiiM Mini is not available yet.