Soooo, firstly i got to round 44 and my game crashed, was like 'aight no biggie, ill play again'

gets to round 50 and the game crashes again, was like 'aight, this is ♥♥♥♥ing annoying now'

trying to stream some highest rounds on this ♥♥♥♥♥ and cant even get past round 50 :(

any help?

edit: noticed that in the higher rounds, when zombies die, they are just getting deleted instead of bodies/body parts this seemed to occure before i crashed both times