Izaro Arena Corners Still Have Fire Traps After Fight

The four corners of the center area in the Izaro uber lab arena with the fire floor traps and spike pillars have random spots where the fire floor traps still activate after the fight. There's at least one spot in each corner, we were able to find two on the far right side.

https://imgur.com/a/wh36u
https://imgur.com/a/grz5a
https://imgur.com/a/PkAka

(Sorry about the image quality :/)

All of the fire traps in these areas that are still activating do turn off and on like normal even after a few minutes and leaving and rejoining the arena.

Same issue, posted a thread here a couple of weeks ago.
https://www.pathofexile.com/forum/view-thread/1994015
Though these spots aren't random, they are crumbling stairs - while you don't get damaged when standing near any furnace on normal stairs, standing on crumbled ones still damages you and, it seems, that this effect is separate from the main furnace and doesn't get turned off.
Main problem is because it doesn't give off any kind of sound or animation and no cwdt setup will react to furnace trap, you can accidentally die in the last room of lab if you get distracted and stand on crumbling stairs.
This was dangerous even before GGG fixed furnace trap damage numbers, making them higher.