On my realm, by myself, I was afk fishing at about Y 200 in a glass room 25 blocks above my mob farm. The room is completely lit with glowstone in every corner (it is a 6 by 6 room). Impossible for anything to spawn. Before I went to bed I checked to potentially empty the chests and see what I got. Instead, there was a massive hole on one wall and on a bit of the floor. Only glass and some hoppers were destroyed, and I had full hearts and hunger, however my mending fishing rod was broken, meaning i was probably moved and was aiming somewhere else. Its not like theres a lot of damage or anything, I just cant figure out what could have caused this. Any ideas?