Thanks for the additional testing! I’ll work on rolling out the fix more permanently.
The autoscaling service is designed to scale up quickly and scale down slowly with a scale-down lag of 10 minutes, so yes that’s the expected behavior.
I think the remaining problem with testmysql may be a separate bug in our deployment system- it looks like you had launched two apps both referencing the same container image, deleted one of them, and now the remaining app (testmysql) can’t locate its image in the registry. We’ll look into this issue as well but for now re-deploying the app should get you unstuck.