Bjora marches lag makes lightpuzzles impossible!

I've been doing the same puzzle without issues a few times before, but today it's absilutely impossible to do the Mystery of Bjora marches lighting puzzle. it is definitely not working as intended. It stops at some mirrors even if it is correctly placed (actually bounces of and makes the correct sound, and then disappears right after. The next time I tried it, it worked correctly. then all over easter Bjora, lights stopped appearing (and I was pretty fast so it shouldn't) then I went back a bit to see if I had messed up, and some more lights started appearing again out of nowhere, I had to go back to where I was and lights stopped appearing again. had to come back all the way to the begining, assuming it had stopped producing lights, and I see it was still making them.it's a MESS, so I hope you guys can fix it, because it's impossible to work with it now.Others in the ma were saying the same thing.