Unfortunately no. I go through a lot of those hardcore worlds you see, and they just go in the trash bin.
What would you like me to do to reproduce the bug? Just make a new world, in hardcore, make a map & move off it to confirm? I could attach that as a zip if that'd do the trick ^ _ ^ Screenshots too, so you see what I see.
Let me know.
I searched the whole Minecraft folder for anything with "crash" in the name, but turned up nothing. In reviewing the files & folders though I found these logs that do seem to detail an event that ate up memory til the game wouldn't function anymore, though the word "crash" doesn't appear.
Seems it was something to do with some sound effect the witch plays. The game tried about 10 times to play it unsuccessfully near the end of both logs.
Hey. Sorry this took so long, my available Minecraft time is limited XD
Anyhow, in summery: I created a new hardcore world just like my other game, gathered everything needed to test this [sugar farm & anvil included], traveled to roughly the same world location as the bug had happened in the other hardcore world, made a map and replicated what I did with my inventory and travel as closely as I could in the moments following it's population, and when I examined the map the dot had returned.
I'm sorry if I've wasted your time here, but you can see the screenys from before, and for what it's worth I kinda wasted my time too; no shortcuts in a hardcore game.
I wasn't able to take a video cuz my computer was excavated from an ancient geological striatum and OBS doesn't like Minecraft for some reason, but I did document the whole thing with a book & quill in-game and screenshots; though that seems like a bit of a waste now. But as a result I do have a hardcore world with all the stuff you'd need to test this extensively sitting on my computer now, so if this bug turns into a thing for other people it could be useful I suppose :b
Anyhow, sorry again. I've not reported too many bugs and I didn't know the world save could be useful to you, afraid I only just learned to always take screenshots XD But thanks for giving it your attention, maps are pretty key to how I play the game and if this bug was widespread it would seriously...bug me X3