Enrolled in JSS, but Checked In is Blank

[johnklimeck]

Cannot figure out why this could ever be the case, one would think that by Enrolling, a Mac would also Check on that same date, and always have that as a Last Check In.

I have a bunch f these, over 50. Last Checked In is blank. I was thinking of how to capture these as a group, I suppose I can do a sort and add the blanks as a Static Group. Anyone else seeing this?

[thanzig]

What are the "Check-In" settings under Computer Management? Do you have Start Up Scripts and Login/Logout Hooks checked?

[johnklimeck]

Every 15 minutes, and yes Start Up Scripts, Login/Logout Hooks all checked.

Was thinking that this could be something happening a while ago, but it is actually happening to a few that were just Enrolled in late September 2014. Something on the Enrollment?