Not sure why blizzard move compact settings into the UI editor. It broke the GamePad action bar. since I have to save a custom UI when toggle compact mode. once I re-log into the game it fails to load the Action bar.
The fix: best to delete custom UI layout. re-log. You can switch back to the default and re-log but i found re-enabling the custom UI breaks the action bar.
Also, playing hunter. I try to change the Pet special ability (R1 + R2) with just basic attack. This broke it, don’t try this. the action bar goes invisible and you can’t bind or drag a new spell on these from the spell book. My pet’s micro management just took a major hit.