Remote mail terminal and item from the set!

Hello! There was a problem with the Transmog of a set item. When using this function, this item is removed from the set and shown as if it is not there. It just doesn't count, even though the thing is there!
Please help and tell me what can be done in this case? And do?

Although now this set item has changed its appearance, but now it is precisely it that is not enough for the set

it's just a visual bug, your set is active as well.

Thank you very much! It really turned out to be just like you said.