Spawned in to temp base out at x4539 y71 z-371 (1620959346) had to exit and save real quick. when I got back and spawned back into base. lava had spawned into existence instantly killing me destroying 7+months of work. after I was able to make my way back all my items obviously gone but there was no lava to be found  ANYWHERE.

Also being as this is my first time ever reporting a bug you might want to make it easier to do so or at the very least let people know you need to have an account to create bugs reports. it took me 45mins and a youtube video to discover how to report this bug.