Using the latest versions of outlook 365 (subscription) and Google Apps Sync (188.8.131.52).
Over the last few weeks - when deleting emails I've had instances of a blank window flashing up on the primary display - it's there for 1/2 second - you see a black header and blank content.
Happens intermittently - every few deleted emails. Sometimes it takes focus away from outlook,
Google are NO help... Anyone seen this behaviour? I can link to a screen record video if that helps...