Attendee record is not created in salesforce after an attendee have attended a webinar

Hi All

We experience some issue with sync to salesforce for zoom webinars. 

We have install zoom for lightning, and do experience different pattern for the webinars created. 

Attendee - attended the webinar are not always sync to salesforce. We have tried to get in touch with zoom for help, but without any luck. 

Have anyone experience the same and how did you overcome the issue?

any input would be helpfull - Thanks in advance