I already tried both WiiM app and Tofal Connect, same problem.Are you using the wiim app with tidal? I found if I use the wiim app first I don’t get higher bitrate than 16 bit 44.1 KHz. If I open tidal connect and start song and then open the WiiM app I get the higher 24 bit 88 or 96 KHz.
No biggie since normally start listen to the daily discovery in Tidal. Tend to use the WiiM app just to setup the WiiM.
Do you use an external DAC? If using an external DAC the problem goes away (sort of) just like you described if we stick with Tidal app only.
Either way, these bugs need to be fixed @WiiM Support