Our organization has about 1500 retail locations and several of them were having similar issues. We updated to 14.7 for a while, and it resolved about half of the stores' problems. We just updated to 14.11 this last week (which is the newest beta available) and it has been pretty solid.
We generally try to stay away from the bleeding edge betas since we have so many stores that it impacts, however 14.11 has been really solid for us so far, across several versions of MX's across our retail locations.
It is not available through the dashboard for self service yet, but if you call support they can push it out for you.