The dragon priest mask pedestals at
Bromjunaar Sanctuary are not returning the mask to the players inventory, this bug doesn't seem to apply to pedestals in Creation Club [CC] homes, further testing is need however.
In the base game they'll return the masks back but it will strip it of it's reforge modifier, this bug also doesn't apply to [CC] homes.
I hope someone is able to look into this, anyways well regardless too all.