Emails appear correctly as delivered in Inbox pane, and can be opened, however when deleted the email disappears from the right side viewing pane but not from the Inbox pane. This leads to the next email being displayed in the right pane but the deleted email header remains higlighted in the left Inbox pane as if it was that email being displayed. This behaviour persists even in Troubleshooter mode. Troubleshooter mode did not start smoothly, telling me that Thunderbird was still running and required closing. I have reinstalled Thunderbird and the above behavour persists. The bahviour persists on my laptop only, not on a desktop with the same profile. The behaviour is quite disorientating, as emails that have been deleted continue to show up inthe Inbox pane unconnected to the email being displayed. One or two incorrect deletions have therefore occured. Picture below attached - the INOV8 email has been deleted. The next email appears in the right pane but the INOV8 email remains in the left inbox pane. When this eventually updates the inbox pane and display pane can be several email out of synch. Any suggestions?