Some observations:
I think crashes causes when obs can't keep up with interface draw. When i unminimize it then it first white and elements become as they should each after another (it goes pretty fast). Just now i had obs running in background doing nothing, with preview enabled, and my pc was under some load (40%-70% cpu, 40% gpu) and obs just crashed, i did nothing with him. By last months i issued crashes multiple times (over 100 i guess). That's happens definetely because obs strongly tied with interface render.