Hi, I'm not sure if it is a bug but anyway I will try to explain.
I'm currently using MB 3.3.7367 portable on Windows 10 Pro 1909, the problem is that I can playback DSD only in direct or WASAPI (shared) modes, when I switch to ASIO or WASAPI (exclusive) the playback is stuck and it doesn't even start and then if I try with PCM is stuck too and I have to restart MB so it seems that DSD playback crashes MB, I recently changed my PC but on the previous one, a Dell notebook, DSD playback was perfect with every mode. The current PC uses Realtek S1220A, I would like to use WASAPI (exclusive) or ASIO in order to bypass the Windows mixer and send digital sound to my amply DAC via optical cable.
Thank you, have a nice day.