Disguising in quests issue

[Mandel]

Hi there, 

I have problem with quests with disguising part - it doesn't work for me - game doesn't phase properly. 

For example "Make yourself useful " - Uldum, "A delivery for Xi-lun", - Burning Stepes and some more.

I turned off addons, used macro (/use Refurbished Trooper Uniform) nothing worked. Is there something I can do?

Thanks in advance

Char/acc.: Mandel,, EN version PandaWow - x100