Desolate tomb 2nd boss shield

[topblade]

I was playing DT. At 2nd boss, me and one of my party member picked up the same shield resulting both of us had the shield, so there was 3 shield in total. But I couldn't move after picking up that shield. It disappeared instantly after drop. I still couldn't move using ASDW but I can use skill also SS, moving mouse just rotate my camera. I am not sure if this is a bug, but can you check this?