Crusader 'Square' stuck active long after visually deactivating

Hi,
I've just tested with my face 3 times, that one of the crusader squares on the ground, that activate for a short period of time when you step on them, is staying active even after visually showing it's deactivated. Killed me three times in the same map. I've included a screenshot of the square (but i don't think there's too much to see, as it is deactivated and im standing next to it). Worth noticing is there's no monsters left in the map, so i'm not dying to anything unseen, i'm drained as soon as i enter the square.