Komentar resmi
When you save a mission it will attempt to download basemap and terrain data if it isn't already on the device.
Hotspot internet connections are the worst type of internet so there was likely an issue downloading some of the map tiles. We test for internet connection and no internet connection. It is very hard to test for a bad or intermittent connection.
Switching to Airplane mode would have allowed for the mission to save without attempting (badly) to download the files.
In general, you can plan and save all the basemap and terrain data you need before you go out into the field. We put a lot of work into offline operation to address the issue of poor or no connection.
