Hi there ,
Your software
My Mautic version is: 3.2.5
My PHP version is: 7.3
My Database type and version is:5.4
Your problem
My problem is:
After merging contacts, some leads were added to the segment where their duplicate was , which resulted in new pending messages, some messages were sent before we killed the process, but when we wanted to see the list of leads that had a pending message by clicking on pending, it was empty.