Android App Won't Launch / Freezes When CalDAV Server Unavailable

[mwaterbu]

Your Environment

• Version used: 21.0 apk (from Play Store)
• Operating System and version: Android 12

Expected Behavior

App launches and is usable

Current Behavior

App will sit on loading screen for several minutes. It may eventually show the task list but is unresponsive and shows an error at the bottom of the screen:

Unknown Sync Error: Error: Invalid response: -3 Network Error

Steps to Reproduce (for bugs)

1. Setup a CalDav server on local network
2. Connect one or more projects to this server
3. Disconnect from local network, but retain internet connectivity (don't go offline)
4. Attempt to launch app

Can you reproduce this reliably?

This can be reliably reproduced. When offline completely, the app launches without issue. However, if there is a network connection where the CalDAV server is not available (example listed above), this bug will occur.