When do network heals automatically happen (if at all)?

I added a bunch of switches right before the 17.2 update. As part of the update and reset does the hub perform a network heal? Everything is running fine, just wondering if I should run one to optimize the network.

Also, Vera would run a heal every night at 2:00 am (0200). Does SmartThings run one automatically or under certain circumstances?

SmartThings doesn’t do them automatically. See the following: