In Trompdoy's cave, at the room where the riddle is, I went into a side room with an illusory chest. When I clicked on the chest, it gives me the FIGHT thing and goes into combat mode, then I can't do anything. This only happened if I did it before talking to the riddle statue. When I reloaded, talked to the riddle statue first, then click on the chest, it does the same as the earlier chest - says FIGHT! then goes back to normal after the burning explosion.