Weird Action bar issue

[Syxx]

Hi, I have a strange issue.

For whatever reason, I get no action button highlighting anymore. (I use Bartender4)
The one I noticed the most is my interrupt.
I'm honestly not sure what I might have done to stop this behavior.
In an effort to fix it I've:

• Reset my UI (Renaming WTF, Cache, and Interface in the _retail_ folder)
• Reset my cvars ( /console cvar_default)

It may not mean anything but I did try ElvUI (Backing up my Interface, WTF, And Cache before hand). Unhappy with it, I restored my previous UI. Shortly after is when I noticed the issue.
Not blaming ElvUI, heh... providing all the info I can think of.

Thanks for any help.