You wont get help based on that topic. Only people familiar with MSSQL will even look at it (if you're lucky).
I would suggest the issue (as it often seems to be) is docker related (or to be more accurate, your use of docker).
I say that for 2 reasons, 1, docker (if its not absolutely needed) is (IMO) just a massive pain!, 2. this does not happen on normal node-red installations.
My suspicion is the secure credentials are not being persisted (or something else is not being persisted) in the docker env.
Renamed your thread for better chance of a docker expert seeing + helping out (or just dont run in docker!)