Titan Colossus boss cant be hit by bone cage

i was totaly un able to hit Colossus with bone cage. i tought it was cuse i had consetraidet effect on it, but even after i took it off the the base radius of 1.8m could not hit the boss at any angle i was trying. please look in to this ggg and also my contaigion keped missing it too but some times hit so not as bad

I noticed that this boss likes to take a break and smoke a cigarette for about 10 - 15 seconds sometimes too. he's got issues for sure