I tried messing up the ui as much as I could and I couldn't make that black bar appear. Would help if you posted a screenshot of it - I suspect it could be Pitbull. Just go into /pitbull config > Player > Other > Totem Timers.
The Tooltip Addon is called CowTip - You can change where to anchor your tooltips there.
( /cowtip > Position > Anchor)
__________________  |