https://docs.paloaltonetworks.com/pan-os/9-1/pan-os-new-features/panorama-features/automatic-panorama-connection-recovery.html
Automatic commit recovery allows you to configure the firewall to attempt a specified number of connectivity tests after:
1- you push a configuration from Panorama or
2- commit a configuration change locally on the firewall.
Additionally, the firewall checks connectivity to Panorama every hour to ensure consistent communication in the event unrelated network configuration changes have disrupted connectivity between the firewall and Panorama or if implications to a pushed committed configuration may have affected connectivity.