I was playing today as sniper on Ammo Mule. There was a gunner over to the right of my base behind that "corner wall". He was deployed and started shooting my bots. I juiced, ran over there with my SMG, and it did NO DAMAGE. So After 2 clips of watching no damage occur, I ran up to an enemy support-assassin combo. I emptied 3 clips into them and NO DAMAGE!!!!! This was a major, very frustrating glitch. I know my bullets were hitting. I stood still and aimed my SMG at the gunners head. It did no damage. It was very frustrating.
I've had this happen as Tank Deathblossoming. I know about the Deathblossom right when you juice that does no damage but I was Deathblossoming over and over and I couldn't kill anyone.