Were you not using volumes properly? We have a section on the recommended setup with Docker:
You’re supposed to be mindful with your data, Caddy or otherwise.
What do you mean by “not created anymore”? Please be specific. What are you seeing in logs or terminal?
Either way, always check your logs for information. It’s possible that you’ve hit Let’s Encrypt’s rate-limit, but that depends completely on how often you rebuild your containers.