I was playing a survival world placing down tracks for my mine, later on I jumped into my mine-cart to head back up.
I was on top of some obsidian when I decided to get off, and instead of me landed behind the cart I was pushed into lava, only I took no damage and I could not mine blocks. I soon began to fall through the world going far past bedrock level. I was -4000 blocks under bedrock until I decided to get off and get back on.
When I got back on the world I spawned at the end of my track system. Nothing was lost, just felt the need to alert everyone about this bug.
I was playing in 1.16.3 with OpitFine (site won't allow me to put 1.16.3 as affected version) but I'm not sure if that had any part in this glitch.
Hey there!
This report is invalid as your game was modified when experiencing this issue. In this report, you mentioned that this problem occurred whilst playing on "1.16.3 with OptiFine". Optifine is a modification that is not supported by Mojang and the bug tracker only handles issues relating with vanilla Minecraft. If this issue still persists in an unmodified environment (vanilla minecraft), feel free to make a new report.