Cold start requirement (By Design):

• Every cold start requires a stable network connection to authenticate and fetch initial session data
• The get_session_data call is synchronous by design and must complete before the app can proceed
• This is a fundamental architectural requirement of the Mendix platform. The entire runtime depends on this session initialization completing
• On slow networks (2G/3G and congested 4G), this process will take as long as the network requires
• This applies to anonymous users as well. Even though no credentials are required, the platform still needs to establish a session with the server before the app can initialize

 
What "Offline-First" actually provides:

• Once the initial data sync completes, all data is cached locally
• Users can work completely offline until their authentication token expires
• Changes sync back to the server when connectivity is restored