Email apps (work and personal) in Secure Folder will send / receive for 1 or 2 days after a reboot, then stop processing received emails. App will eventually show list of headers but no content when email is selected. Even swipe down to refresh does nothing until Secure Folder is restarted again.
What could be causing this?
Reloading phone consistently corrects issue for a day or two.
Email on PC works normally, so is not server issue.