AWS can change IP adresses during instance stop/start.
when you run PMM on AWS it is mandatory to use Elastic IPs for pmm-server and all pmm-clients, because both sides store IPs in config files.
instance-id change itself cannot broke anything, but during migration it is possible to lose one of EBS volumes or Elastic IP.
we did a server image and create the new instance from it.
public ip hasn’t changed since we use elastic ip, but private ip changed along with instance id.