Yeah that's not good, I once had to clear out an insane roach infestation in the basement on a friend's save using mods with how they were dying in the walls. Couldn't get them out any other way, so you probably aren't solving this issue.
Viewing post in Voices of the Void 0.8.2 Bug Reports
If you can't solve the problem you gotta kill it or something. That said I turned off props impact physics and I think I'm gonna stick with this setting for now. The game is still pre alpha so it is pretty normal for it to have bugs, especially given the fact that it's garry's mod style game, it is what it is. (also I lowered the roach count in settings at the start because they were causing lag)