I have a very inconsistant bug on Minecraft Realms, aparently others are having simular problems, but i have found no reports so im writing this here.

In current Minecraft, there is a bug on realms that causes the anvil to glitch out. when the bug is active, items cannot be renamed. you can, but the anvil will refuse to give you the rename item with the output slot blank. After some testing, placing an item into the 2nd slot and removing it resets this bug. I have no idea what causes the bug or cuases it to go away. I would provide screenshots, but the bug stopped while writting this. ill screenshot it when it happens agean.