Yes, that would nominally be the case. I would like you to open a support ticket, and reference me in the case. I have non-production resource our support staff can wield to help.
Run the following SQL statement :
Update IPAM_Group set ScanInterval = 10 where GroupType = 8 AND DisableAutoScanning <> 1
Change the "10" to the time interval in min aka 4hrs (60 x 4)= 240
numbers valid are 10 thru 10080 (10 min to 7 days)
GroupType = 8 is to limit the change to subnets