What is this bug?

I played on my hardcore character and it was going so strong. started playing simulacrum, and this happen:

after I cast a orb of storm my character were unable to attack and I got killed.
I will add a video below:


https://cdn.steamusercontent.com/ugc/11313576867380566251/4130B1406EDFD9825D78FD2338013FE37B6DFD3E/

I am not happy since I lost all that time I put into my level 90 deadeye

edit: pls fix this bug I would love to play a simulacrum without being worried to die of bug