You could always open a case with support, but I also have a few more questions or things to try;
1. What kind of devices do you have?
You could try to add the following reg key to increase the inventory sync interval;
Increasing the interval of inventory sync, modify the registry:
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\LANDesk\Mobility]
Add a DWORD value: MobInvUp_Interval = 30
This example would cause the inventory syncs to occur every 30 minutes.
You could change it to something like 5 minutes.
Also, do your devices show up with the complete inventory information in AOD, or does the device say "unmanaged"?
Thanks,
Nick