Crashes of Deflemask? Not, but when i use all channels (including psg) and start video recording in the background (you know, slide down from right top corner and hit record) sometimes it stops, or there is some gaps in recording, so recording and genesis emulation takes many cpu resources. But now i don't publish these tracker videos, i simply render song to wav.
I also use commands, mostly TL (total level of each operator), MULTI and some arpeggios (arpeggios can be also used on FM sounds which is quite unique), so this is one of ways to get sounds modulated or animated, because it doesn't have filters etc.