Pretty simple issue. throw my level.dat file attached to this thread into forge instance in the world folder fresh. Load up the game and run debug start and type save-all. Look how long the save lasts and the stall.
The simple question what is causing this and how to fix it? I thought was a mod at the time running and removing every mod to find the issue revealed that it was my level.dat file that seem to be damaged.
Not sure if there can be a fix or solution or at least find out what cause it to be this bad to begin with.
Thanks.
level.dat