PowerProtect Data Manager. Why does the 'Step Log' of a FULL VM backup lists 'sync (full)' and 'sync (delta)'?

PPDM VM backup (FULL) is successful. However, when looking at the step log, it displays the following steps:

Performing LWD sync (full)

Performing LWD sync (delta)

Expected behavior.

This is the expected behavior of the backup. Because files created during the full sync flow are inconsistent, they cannot use them to restore the VM to a consistent point in time. During the full sync flow, the VM still serves I/O operations, and data in disks might change during the full sync operation itself. A delta sync operation is performed right after the full sync operation, which creates a consistent point-in-time copy that can be used later for a restore operation.