Slight lag with nUI for PTR

[QuestorWI]

First, Thank you for you speedy release of nUI for the PTR.
I installed the new nUI for the PTR & I am experiencing a very slight lag issue. When I hit a hot key to attack a NPC there is a longer then usual lag between the key being pressed and released & the action occuring on all characters (ie. a Druid and a Death Knight.) I play like characters on a live realm and do not have this issue.