When I reach the Inbox from the Messages app, I can "move to trash" and the message is immediately removed from the list. However, when a new message arrives and I let qpe directly open the Inbox following its proposal
to do so, the messages are not removed from the list, although they are indeed moved to trash.
When I send an SMS it is correctly sent, then moved from folder "Outbox" to folder "Sent". However the numbers of SMSs this folders contain are not updated. Maybe this is related.
When I reach the Inbox from the Messages app, I can "move to trash" and the message is immediately removed from the list. However, when a new message arrives and I let qpe directly open the Inbox following its proposal to do so, the messages are not removed from the list, although they are indeed moved to trash.