The following events occurred 20 mins ago on a DE server.
Everything started failing over a 20 min period.

Firstly my SG5K and it's mags vanished from inventory.
Then hatchet stopped inflicting damage on zombies.
Knife then stopped inflicting damage.
SKS stopped inflicting damage.
Closed myself in barn to heal but bandages and rags wouldn't work.
Turned around to see zombies entering the open door I had definitely just closed.
Death.