Geez, I didn't realize the dip was that bad. That'll definitely need addressing, I might just include an option to turn off the lantern effect entirely.
I don't have the best mobile device for gaming tbf but considering the rest of the game was running smooth as butter up until that point I'd wager that still shouldn't be happening, even if the framerate loss is less severe on pc.
Joiplay users do have the alternative of just turning on noclip for that particular section though so it's not impossible to get the endings.