Bug with displaying the aura in the mercenary menu

Greetings to all. I apologize for the google translator.

Faced a small display bug. I switched to the second difficulty with the mercenary from the second act, with the aura for protection. But when I go to the mercenary menu on nightmare difficulty, an aura of cold is displayed. Although my character still has an aura of protection.

I think this is due to the fact that on the complexity of the nightmare, the mercenary from the second act should have an aura of cold, but in the original version the skills in the mercenary menu were not displayed, so perhaps they just forgot to check this point.