So something strange happened to me today... I was making lavafall blocks to turn into walls to put up into my Wizard's room, so I went down to the cavern, and started crafting the blocks from a lava pool close by my Hellevator. After I was finished, I went back to work on my house, but I left the Crystal Ball next to the lava pool (In case I wanted more blocks, and because I'm lazy...) So a couple days passed before I needed to use my Hellevator again... And when that time finally came, I dropped down into my Hellevator, only to find the entire shaft, as well as the immediate area around it, filled completely with lava. I have no idea how it got there, as I didn't alter anything that hasn't been there since I made the world back in 1.21. Luckily I had my Lava Waders on.
Anyways, I was wondering if anyone knows how this could have happened? Bug, or does the Crystal Ball have magical duplicating abilities? I looked on the Wiki, but have seen no such thing.
Edit: PS4 version, by the way.