Ok, You can also try uninstalling Power and then reinstalling, the developer thinks it is the caching and the lazy load which may fragment the plugin script thus not ordering the script in the updates in the manner they were written. Maybe if you try turning off the lazy load on your test site and updating the plugins?
Let us know…Not sure why it wouldn’t let you post, maybe the chain was two pages long now. if your Premier is active you can also post in Premier forum.