I have a glitch like this on my 2nd game with the Aleroth Archmage set. When I go into my inventory to look at the stats of the gear, it unequips the armor and leaves my character in her skivvies. I have to put the armor back on and exit. Then if I go back into my inventory, it removes the armor again.

I have 47 Base INT with no boosting whatsover ... RE> 47 base INT completely naked. And I am lvl 30. So I am over both requirements for the armor.