Minecraft Username: AgentHare Brief Description: When you reach the edge of ECC, it teleports you to a completely different y. Instructions: Go to the edge of ECC in a small tunnel. Reach the edge of ECC. How many times did you recreate this bug?: At least twice now.. Result: Teleport me from y level 8 to y level 61 Expected Result: Teleports you back by x or y coords Evidence:
When you reach the edge, it "bumps you back" a certain number of blocks. If those blocks are otherwise occupied, it lifts you up to the first "safe" unoccupied level.
Emau is right. As well, this has been a thing since early beta (maybe even alpha). It does this (intentionally or not) to prevent you from suffocating and otherwise getting stuck in blocks. It's frustrating, but probably for the better. u.u