For extended periods, both random and as soon as joining a server, I can't take anything in or out of my inventory, equip weapons/items, or interact with things such as doors and water pumps. This seems to happen even at 0 desync, though usually higher.
Can only workaround this by a) waiting it out or b) switching servers until joining one that works.
N/A - Seems to be random.
Encounter the same problem often.
Often the daytime servers work pretty well but I can't open doors not pick up or use cans or things like that.
The night servers usually do work, but then again I can't see a bloody thing and the daytime does not seem to change, so everything is in pitchblack darkness, and with a flashlight its quite hard to kill a zombie.