Confirmed happening to 5 of my friends. About 3 mins into a server starts lagging so bad to the point the game locks up. Other patch I could not spawn now I CANT EVEN MOVE

Can confirm this also. Noticed it myself also but never got around to reporting it. Happens only when you do not have a full stack of whatever ammo you are emptying out of something example box or clip etc. Only way to get around it is to drop the ammo stack that is not full then eject the ammo and then pick up the stack you dropped that was not a full stack. Only way you can not lose the ammo.

If you do not drop all stacks that are not full of that ammo you are about to eject / empty it will 0 out losing the ammo of the stacks.