Hi Michele Blakeslee •
Welcome to the Microsoft Q&A Platform! Thank you for asking your question here.
I understand that you are experiencing issues after shutdown your container instances.
Do you have any error logs or details from the events?
Anyway, could you please perform STOP/START of your Container Group and let me know if solved the issue?
Stopping and starting move your ACI from one cluster to another that is in better state.
Please do not forget to "Accept the answer” and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.
If you have any other questions or are still running into more issues, let me know in the "comments" and I would be happy to help you.
Thank You.
Lisboa