I had the same problem with ladders to roof top of hotels.
Tried this and died 2 out of 4 attemts.

[2nd time when I ran back to get my gear, body was gone (another bugg)
so went full emo.]

I don't have this issue, and I'm a zombie warrior.
What wepp were you using while fighting them?
Did you have desync? or high ping?

Was going to suicide, walked up to zombies.. and they went full retard.. I could punch them to death without getting attacked.

I have the oppesite problem with the M4 Silencer, with the Silencer 556 attached it won't reduce the sound noise.

This have now become so bad, the game for me, has become unplayable. I always play on char for 3-4 hours, getting geared. When server goes down -> Wait a few minutes -> Change server -> Character is gone.

I keep getting this problem, it seems to be when you switch servers. Maybe the info don't get swapped between servers and it creates a new one?

I have set my default, so that is not the reason.