I am still adjusting to the new email inbox and am consistently frustrated by its presence and incongruences with external mail client with that said we are working to hard to adjust even though it means reading mail twice, once in mail client outlook and once in ERPNext to validate.
Perhaps one short term fix is until full synchronization and actions have been linked is to allow us that when we close an item in the email inbox in ERPNext it takes us back to the email inbox mail listing not just execute the closing communication and remain in email thread.
On another thought what would be even more helpful but I am sure subject to problems for the less attentive would be to add “close” to the menu drop down in email inbox right next to “mark as read”…
curios how others are handling the duplicity as its been awhile since ive seen much on this.