King in the mists Bug

Hello, GGG. Found another sad bug in your game. King in the mists becomes inactive in 2-nd phase. If your devs don't have enough skills to make several boss stages, and they can't cope some invulnerable phases, maybe you shouldn't give them task to do these phases? More than 0.5y passed from "early" or better paid access started, and you still have such dump bugs.
What's wrong?
https://www.youtube.com/watch?v=N7YBzQ8Soy0