In my scene, most blocks are good, except for the bell, which is not exported for some reason. Material preview (also the same thing in rendered view): <img width="145" alt="image" src="https://user-images.githubusercontent.com/50642934/198352729-18316475-54f0-45e7-a6b3-9cc0d5d1f5ee.png"> Using the latest version of jMc2Obj on a 1.19.2 world.
In my scene, most blocks are good, except for the bell, which is not exported for some reason.
Material preview (also the same thing in rendered view):

Using the latest version of jMc2Obj on a 1.19.2 world.