Thanks for joining this thread, @mgw. I appreciate you for performing all of the recommended steps to fix the issue. 

 
At the moment, the status of the investigation is still in progress and our engineers are still working on a permanent resolution. I'd suggest you follow my colleague @MaryGraceS recommendation to contact our Technical Support team to make sure you'll be added to the affected users' notification list.
 
Once again, thank you for bearing with us. I'm always around to help you whenever I can.