So I've been playing Dayz on official 1st person servers, for a while now and I've noticed that there's this massive bug and multiple issues that take place, when reconnecting to a server that has recently shut down, while Ur in a town. (only seeing these issues on the last gen console, however idk if the new gen consoles also suffer this as well)
When logging back into the server that has refreshed while spawning back into a town, many buildings and random objects within the town just fail to appear and remain invisible despite the server trying to render them. This always happens and is a big problem as you are able to see loot within the invisible buildings and players who are spawning back in as well. The only way to know that it is there is to run into the hitbox or by seeing loot in that general area, a player within that building or a prompt telling you to open and close the doors.
A following issue that comes from this is that the area you spawn back in from, within the towns, becomes heavily buggy, stutters often and can even freeze the game frequently which has caused my death to zombies on many occasions as other players may not see the same thing as me and the server is still running in the background while I'm frozen or having stutters interfering while I'm playing.
The smaller of issues that I've only replicated a few times is invisible zombies and them also not playing their sounds when alerted, docile or while attacking. The only instance where I've encountered both problems at the same time and being unable to hit the zombie I can't see as there's no zombie in my vision or hitbox in my general area while being attacked. I found out that this issue is caused from zombies having sometimes a delayed alert to a player and it happens to get worse when reconnecting to a recently shut down server. They only attack where they last saw you which means U can be killed without even seeing the zombie your self.