This lovely issue just cropped up. Track will be playing (either side A or B) and just drop the audio, while the waveform is still playing. When you try to relaunch Traktor it freezes with the "Flushing Background-Tasks" message, which requires a system reboot.
I am on a Macbook Air with the M1 chip. This happened with 3.5.3 and with the latest update that came through Native Access.
Any help appreciated!