Emails Getting Stuck, creating multiple tickets and multiple replies

[melotel]

We recently started having an issue when someone emails our support department, the email is stuck and every time the cron runs it creates the same ticket multiple times, until we have to login to the webmail for the email account and delete the email there.

 

The same happens with replies to a ticket. When a customer replies to a ticket, we end up getting lots of the same reply in the ticket. until we have to go into the webmail and remove that email.

 

It's almost as if WHMCS is not marking the email as read. Or... it is still accepting the email as NEW even if it is marked read.

 

This was never an issue before. Any ideas?