[JENKINS-55556] EC2 unable to retrieve private IP (+ other buggy behaviour)

I must say any version > 1.39 seems ultra buggy for our use case (ec2 spot instances @ c4.xlarge):

when launching manually the plugin can not pick up the private IP and tries to connect to "null:22" endlessly
when launched "on-demand" the plugin will launch 10+ spot instances, non of them will work though

Downgrading to 1.39 makes the plugin work on the exact same setup. Curious why AWS is not stepping in to give this plugin some love...