I'm trying to upgrade all our customers to the newest version of our app. In the developer org for the app, I have upgraded all but a few orgs (for those orgs, the upgrade failed). However, I see many more orgs (a few thousand) in our LMA that have not been upgraded. Some of them are active production or sandbox orgs that have recently installed our app. But if I search for their org ID in the Push Upgrades section (e.g. click Push Upgrades > Schedule Push Upgrades > enter the newest version of the app > "Filter by Organization" under "Select Target Organizations") I don't see the org ID returned there.
I see that next to the "Version" picklist when scheduling a push upgrade, it says what versions are eligible to upgrade. The org I saw in the LMA is on a version eligible to upgrade, but does not show up in the Push Upgrades section. Why is that?