Board Thread:Bug Reports/@comment-26358197-20150501131640/@comment-27219153-20160813002831

You can delete your player data, which would delete your inventory, armour, ender chest contents, and possibly some other stuff. Although I think your alignment would remain as there is a seperate player data file for lotr things.Please save a copy of your player data before you delete as it may be possible to restore it later.

Since this problem is a recurring one, it leads me to believe that something is corrupting your world.

Just out of curiousity, what region was the dwarf in?