Outbox - not clearing automatically

For some weeks I’ve noticed that emails which I have written while offline and which are thus placed in my outbox do not clear once I have gone online, and even after I have closed and re-opened K-9. They are not sent. Even when I go into the outbox and press the send button the emails do not leave. The emails in question are addressed to people to whom I am frequently sending emails directly from the app. So there has appeared to be a glitch in the automatic refreshing of K-9’s Outbox. My apologies if this glitch has now been attended to.