Kanai Cube recipe not working

“Work Of Cathan”
which is suppose to remove level requirement on items does not work

while leveling I used my blood shards to obtain some gear from the ptr gear vendor as well as level 25 gems. I tried removing the level requirement on multiple pieces of gear, with a 25 gem of ease into cube and get a red error/warning saying transmute failed

Seeing that duplicates drop from RGs despite already having them from the PTR vendor, it’s likely that the gems from the vender are special versions.

I suspect that if one levels a Gem of Ease normally, it will work fine in the cube recipe.