TRIAL SCORPION BUG

In the stage 3 in trial, the scorpion boss bug. when he used his ability the enter in the door. I cant damage him and he is not able to move.
see the image below.
https://images.steamusercontent.com/ugc/47958532957197284/BC2A11AD2DF295690F9D79E8C8965A30A6F1874F/

Happened to me as well.

Bug Report ID: #3929355563