So this is a strange one. sometimes when I teleport (seems to happen more often when using the warp stone, or when going really long distances), a fake player entity is generated.
it has my skin except all the outer layers are gone. It shows up as my name in HWYALA, with 20 health and the mod name "unknown".

I can't move, open inventories or use items, and in first person I see the inside of its head. in third person I can do a 360 turn without the entity moving, but my own player model is either invisible or occupies the exact same spot (or it is my player, but why would it show up in HWYALA)

the first time it happened I tried to punch it, and the game crashed. but didn't generate a log. the client opened and said something along the lines of "trying to attack unregistered entity" or "trying to attack illegal entity", I'm not sure which, it didn't save.

the second time it happened I tested a few things. I couldn't open inventories or use items. didn't left click with anything this time. can't shift. the atlas minimap overlay appears when selected. the fake model doesn't change when selecting items, it holds nothing.

I also tried a few things to get out of the state, but the only thing I found was /kill, which seems to fix the entire thing, but requires that I set my world to LAN and I suffer from the freeze-on-exit bug, which is annoying.

I'm currently using:

MC 1.12.2

Forge 2702

and waystones 4.0.43

Did this happen without any other mods installed? Otherwise I need a mod list as it sounds like a compat issue.

I just updated my modlist to the newest versions, and so far I haven't been able to reproduce it. I think it may have been fixed by one of the updates, possibly enderio.

Alright, let me know if it happens again.