I know you assigned this already @Geez, but it seems like when the bug occurs, it comes along with some animation weapon bug. After server crash/restart it was fine, and the gun was making sounds before, but once they reached the NWAF tents, one person's gunshot sounds stopped working.

Not sure, don't currently have a weapon in 1.0, but I think it was working fine, for the most part, yesterday in EXP, although not many infected were getting attracted while I was in that area of Dolina.
(The 2nd female zombie wasn't stuck, and was wandering around, however she did not aggro to the gunshot (1st clip)

@Geez Ghost bullets or hit registration is still very much a thing and needs high priority especially for a 1.0 launch

@Geez Very game-breaking indeed since, you can have aerial vision of a whole town you are looking at (very bad exploit)

Can confirm, happening with some of the walls guarding Pavlovo Military Base
Most of the walls surrounding the NWAF ATC
and other walls scattered across the map including a small compound between Sosnovka pass and Verensnik (open field)

You can light fires with matches, but not blow up cars w matches for some reason

You can light fires with matches, but not blow up cars w matches for some reason

You can light fires with matches, but not blow up cars w matches for some reason

You can light fires with matches, but not blow up cars w matches for some reason

You can light fires with matches, but not blow up cars w matches for some reason

You can light fires with matches, but not blow up cars w matches for some reason

You can light fires with matches, but not blow up cars w matches for some reason

umm, I can't really test this right now, as I don't have access to the main culprit affecting this, the M4A1 with the carry-handle sights, and possibly M68 optics, and Kobra Optics.

the jamming was once every magazine, I fully sprayed when I tested it (Once in a 25round magazine)

Haven't tried in awhile Geez, but it may be character specific for that issue. So you may need to select that female character in order for it to happen, but may already be fixed.