Armor, regardless, reverts to Protection 4 when worn

[lEfex]

What is the bug: Whenever one puts on an armor piece that has more than protection 4, it reverts to protection 4. This happened with a pair of Bruni leggings, and a full set of miner armor.
Where is this bug located: It is omnipresent.
How can we recreate it: Wearing a piece of any special armor.

Thank you!