Hey. This time I tried seeing if it is there without setting a waypoint, with waypoint set and arrow disabled in the settings, and with waypoint set and arrow enabled. All 3 times "GPSArrowTab" is there and blocks right clicks. It's also nowhere near where I actually have the arrow as you can see in the screenshot :/ https://i.imgur.com/3BcdCWb.jpg
I've used WoW-Pro for years and in WoD, Legion and now BfA it's been awesome for just going on auto-pilot and working your way through a zone. It has 3 levels of depth you can set, so you can set it to just do 1) the main story, main points of interest and rare mobs and treasure that aren't far off the beaten path; 2) every quest with a more thorough dive into the side stuff; 3) absolutely everything.