Yes, finally I did update the BoomPink to 3.788 now (sorry, had no time to join all the testing before due to family issues) and can confirm, on this RPi 4b with Allo Piano 2.1 in Dual Stereo mode and resampling set to 32/192 the machine works just fine using Qobuz as the music source. Having a smooth 90’s ambient one man party now…
Tomorrow the SilverStream with identical hardware would be tested 
Thanks again to anyone, who were involved in this fix!
I would apreciate, if someone could drop a donate link here for @pelwell , I would definitely click on that and do my duty