Had a few issues with the zombies myself - my friend and I were holed up in a barn north of Komarovo, lured all of the visible zombies in and hacked them to death. However many we killed though, they just kept spawning in right outside, we couldn't get through them. Also had the same issue with gear in backpacks, lost 2 morphine injectors and a bloodpack without any obvious cause. Great mod, loving it so far, keep up the good work.