This has been happening to me for a week now, I can dump and entire magazine into an enemy player and they don't die. the shots do hit, red comes off their body but the bullets do no damage.
It's extremely irritating becasue I'd dump the and and they don't die, they turn around and kill me while i'm reloading!
it first happened on the aloha server, babel map, where I shot someone 5 times with the shotgun and they did not die. they killed me, I respawned and it happened again. basically the guns don't work, the grenades don't work, leaving me only with the spade.
its very common with the SMG, I'd shoot someone 30 times and they don't die, I reload, shoot 30 more times, they don't die, I have to go up right next to them and spade to make a kill.
I happened 15 times today, playing on the aloha babel server, I shot someone more than a fatal amount of times and they did not die, its like they all had god mode on. 2 hours of gameplay, 15 times!