1.13 final battle room 2 fire spot not avoided by pathfindin

Hi,
In the (final battle?) room with the fire orb, there are 2 cases with fire.
I wasn't sure they were damage-dealer since my cursor didn't show anything, but then i asked a character to move from his starting spot in the room (right under the right fire spot) to the north of the room, and the pathfinding didn't avoid the fire spot.
I thought "okay that's just decorative"... but no. That's a damaging case with fire!
Maybe there is something weird with it since now i can see that it does damage but i couldn't see it before?
In the (final battle?) room with the fire orb, there are 2 cases with fire.
I wasn't sure they were damage-dealer since my cursor didn't show anything, but then i asked a character to move from his starting spot in the room (right under the right fire spot) to the north of the room, and the pathfinding didn't avoid the fire spot.
I thought "okay that's just decorative"... but no. That's a damaging case with fire!
Maybe there is something weird with it since now i can see that it does damage but i couldn't see it before?