I am not sure how hedgedoc handles the config file delivery, but an I can't see how an app restart would load an old config file.
Can you check if this is some caching issue? It seems you can fetch https://hedgedoc.example.com/config for your instance to verify the settings you've mentioned.
@girish Cool! Until then I will try to get it working myself. I'm about to submit a support request regarding a custom app deployment of hackmdio/codimd. But when do you think it will be available on the App Store?