In my single player file, I made a village where my villagers are registering as desert villagers, and I was leveling the traders in my village. When I placed a cartography table, and my desert villager turn to a cartographer, I started to trade items with him until he gained a new level. The Cartographer reached full experience bar, and then froze. I could not interact with him, I try to exit the game, and java stopped working. I ended the program, and the saved right before I stared to create the villager. This desert villager was made from and egg spawn er from creative mode. I attached a picture of the all the F3 data. on the game rules I turned off mob griefing false, for additional data