My boyfriend and I were playing on my realm when I was trying to rename a name tag. Nothing happened. When I deleted the text it didn't give me a 'cost one level' like it normally does and when I rename it, it doesn't pop into the end result slot like it is supposed to. In a sort of attempt to rename the name tag, I added a second name tag to the second slot in the anvil and that let me rename it like 30% of the time. Unfortunately I don't have screenshots of the attempt at renaming the name tag with a second name tag. I did all things that I knew to do in order to fix it. My boyfriend was also having the same issue. 

I was renaming nametags in attempt to help my villagers to stop despawning so it would be appreciated if this could be looked at! Also my tridents are still despawning....but that is manageable to live with.