ISIC becomes Immune during Boss Fight

Just finished playing the ISIC boss fight on The Algorithm.

It looked like he got damaged by a dot somehow and switched to the second pahse where he becomes just his Head and flies around.

It took a bit but I noticed that any damage I dealt caused the Immune message to pop up and he was slowly regenerating health.

Obviously, that kind of made him impossible to beat…
Hope you guys can get that fixed soon!

I also had an issue with ISIC jumping up then slamming down and then suddenly appearing outside the battle area. The game clearly thought he was where he was supposed to be, because I was still taking damage from his stomping actions.