Custom Poller's Poling interval

Hi experts


I revently configured a custom poller's Collection to be polled every 30 days. (The custom polled collection is the device's ChassisID, so given that devices are not changed to often , a 30 days period is reasonable  ). 


Everything seems to work fine becase in Custom polles Intances tab are the devices's chassisID . However when a node view is opened and 'Custom poller' Tab selected, the is no information regarding Chassis.  The tab shows the collection's name (Chassis ID) and text displaying 'CustomPollerSuccessful : True' 


However when the custom poller's interval is set to 10 min, everthing works as expected (The custom poller tab in node view show the object Chassis ID).



IS there any restriction to this interval ?


Thanks in advance