Mouse Won't Engage Groups <ALL> When Clicked

[MousePotato]

Hi all,

I'm having a strange issue with mice and Pro Tools. The problem occurs in both PT 10 and PT 11. In general, on my Mac Pro, my Magic Mouse works fine, but there's one buggy issue.

When I left click on <ALL> in the Groups window (either in the Edit or Mix Window), the function does not engage. Instead, I get a popup menu that shows options, as if I had right-clicked on <ALL>.

Solutions I have tried:
1) Repeatedly left clicking on <ALL> -- once in awhile it will engage (one out of every 10-15 clicks)
2) Trashing preferences and rebuilding them – no improvement
3) Trying different mice (either Magic Mouse or Logictech) -- no improvement
4) Trying a different computer (MacBook Pro) – no improvement
5) By trial and error, I held down the Escape key and clicked, and the <All> function worked every time! I am not sure what conclusion to draw from this.

Has anyone encountered a similar problem? I’d appreciate any comments you may have.

MousePotato