Service only works during 10secs then hangs

Hello there!

My mobility service has a strange behavior. When i restart the service, it processes and syncs the accumulated tasks then it stops syncing again until i restart the service again.
I was using mobility 1.2.5 299 and even updated to mobility service 2.0 but the problem persists.
Already looked into logs but can't seem to find anything that points me to the right direction.

At the web console i can see the message "Time to Process GroupWise Events: It is taking a long time to receive events from GroupWise" but thats all.
Currently with 81 users and around 90 devices.

Some help would be greatly appreciated.

Thank You