We can only really work with (mostly) reproducible crashing. Intermittent is ok, sometimes. If it just happens out of the blue and you have no idea how then there’s practically nothing we can do to help.
Get together a small patch with as little as possible in it you need to reliably reproduce, document it like crazy so a half crazed fully caffeinated tech guy can read it straight through, and send it and the whole crash report into support at cycling 74 dot com.
Windows is the same except minus the crash report of course.