My older holo releases had this problem. My newer releases I have addressed it. The foils on the carts have been improved and now have a laminate seal to protect them. Also, I have never noticed the thickness of the labels to be an issue.
Most of the boxes I do now are non foil. SInce this was the prototype for this project however I couldn't resist. This particular box IS sensitive to moisture. However if I decide to release it as foil, those will not be. I go back and fourth with wanting to offer foil or not for the boxes. I personally like the effect, though the material is difficult to work with.
I will more than likely offer an option for foil/non-foil in the final release
Regards
-Spencer