Caldiro High Priest Bug

I have a plant build and I love using the Pin support. A lot of bosses bug and stay in 'stasis' after I fully pin them (hit 100% pin). The priest has been the worst, he stays underground and becomes invincible. Met the enemy three times through the vaal temple event in a map, three times as he bugged. I am firm to believe it is PIN debuff that does it. I had to take off my Pin support in act 4 at the last boss due to him bugging and me having to run the entire fight one more time. I use entangle with Pin and a variety of other supports.