Overgrown Shrine boss pushed out of arena

I pushed the overgrown shrine boss out of his arena as he was getting ready to do his split phase. I was unable to damage the boss in this position.

I knocked the boss back using vaal double strike and a lion's roar flask providing knockback to the hits

I was unable to leave the boss arena

Same happened to me. He got bugged into the wall by projectile weakness knockback.

I also got him stuck with knockback in this position. It happened almost immediately after he teleported next to the wall.

The same problem here. Managed to push twinned bosses inside the wall just before they would've died.. King of the Hill knockback with scourge arrow.

This seems to happen in Rotting Core as well, also with Maligaro

https://gfycat.com/defiantcautiousalbacoretuna

Same here - twice this week.
Blast Rain trapper, using King of the Hill.
Can use portal, but not the Arena exit, even though the exit is visible.
Also using Blink Arrow, CWDT Ice Golem + Enfeeble, Orb of Storms+COH Ass Mark+Blind, HoA + Anger.