Thanks for checking in on this problem. Happily, it doesn't seem to be a common issue. All the same, is there any chance you could pop up an error message (with the possible solution) when the problem does occur? Something like this could be very helpful:
BTW we receive the message above almost every time we attempt to edit a page in Pro. Often, we need to attempt the load many times (4+) before it succeeds. And sometimes, the page loads completely blank, or with only the header and footer showing. Can you shed any light? We've attempted to diagnose plugin conflicts and "aggressive page caching" with no success.
All the best,