I have already previously made a post about this bug, and nothing has been done to fix it. When you open the editor and place down a unit, and switch pallet to doodads or anything thats not the Unit while having it copied, when you do Ctrl + V to paste it down again, instead of changing the CURRENT pallet over to the units, it creates a duplicate of the pallet which will later cause the editor to crash. Here is another link to the video: https://www.youtube.com/watch?v=YYEbzN9IszI . This causes the editor to desync and crash overtime causing all tooltips and such to get wiped.
**The PTR branch of Editor doesnt do this bug, its only the live version of World Editor.**