The nextcloud app does not support IPv6

Two servers are built by ourselves. The nextcloud domain name is www.xxxx.cn and the emby domain name is tv.xxxx.cn. These two domain names only provide IPv6 addresses without IPv4 addresses.

The version of nextcloud app is nexcloud dev android app, version 20211202. When WiFi connection is used, nextcloud app only uses IPv4 parsing, not IPv6 parsing. It is provided as ā€œserver not availableā€, while emby app can be used normally and parsed with IPv6.
屏幕ęˆŖ图 2021-12-04 100502

Till now I had the feeling the app (maybe Android itself) prefers IPv6 ā€¦ Little surprised about your post but it sounds you are confidentā€¦ for me itā€™s a clear bug - I think itā€™s better you file a bug report on Github

Thank you.