The priest robes that can be found in the attic of Raedric's Hold, I decided to enhance one of them. After placing it in the stash, it lost all of it's enhancements. Moving it back in the character inventory didn't fix the issue.

Haven't encountered this but I hope it gets more visibility.

I noticed this with other armor I had enchanted.

put +1 perception on a piece of leather armor (the armor the mage comes with).

later put it in the stash.

when I pulled it back out, it no longer had the +! enchantment on it, though it still glowed blue as if it was magic.