Then I don’t know 
Can you shar some log messages to show what you see when the db is not ready and after the compose down and up? Please, use code blocks for log messages as well.
I can only guess that the database is in a wrong state although the initialization was finished and removing the container and recreating it to mount the existing files can help. If this is the case, stopping the containers instead of removing them should help too.
PS.: I moved the topic from the Community category. That is for events and for asking about the community.