How to diagnose rollback? (boot loop)

Legato Application Framework
1

After applying an update I barely have enough time to do an app info before the chip starts rebooting a few times and ending up rolled back. The output of that app info shows all my apps except for tools are running and they all have legato.version: 21.05.2.rc2 which is almost the same as the output of legato version namely 21.05.2.rc2_7f59219499ecf02274c4ac7575e4f8c5. Is this discrepancy the reason?

Oddly enough I used the legato base from the R17 components page: https://source.sierrawireless.com/resources/airprime/software/wp76xx/wp76xx-firmware-release-17-components/#sthash.ZCKSBBjJ.r0Jtabo5.dpbs
I would assume the legato version to be exactly 21.05.2.rc2 after flashing it but it wasn’t.

2

What have you downloaded to module to trigger the rollback?

3

an update file made with mksys containing the aforementioned apps. Is this what you meant?

EDIT: I circumvented the issue. I applied a different update that didn’t cause the rollback and kept the apps that I could only briefly see with my previous attempts. I don’t understand why, but I’m satisfied for now.