In order to know why thing's happen... to get a stronger feeling that it's you that's piloting the drone & not some unknown suspicious DJI algorithm that will take you with surprise any minute, you need to get around 3 rather simple thing's.
1. Out from the user manual
(HERE) read up on all functionality & step by step test all out with your drone in an outside open place without obstacles... & do it low, slow & near.
2. Learn how to get your flight logs up on the PhantomHelp log viewer site
(HERE) ... there you can check off what happened during a flight if you think something out of the ordinary happened, like sat. count, stick moves & battery levels. All is presented in a simple interface so you can replay the flight (example how it can look below)
View attachment 161061
3. Learn that the only thing that can regulate your flight physically, beside yourself... is the DJI Fly Safe material. In there you have all regulated flight zones that DJI have put in... this material allows you to fly, or asks you for your consent in some cases or it can prevent you to fly in an area or above a certain altitude. This material can never be taken for 100% correct comparing to the real legal regulations from FAA, you need to check other apps to know for sure that your flight will be legal...
Here you can scout out an area on your computer, where you plan to fly in regards to the DJI Fly Safe -->
(HERE)
If you can get your head around above 3 points, you will be a much more confident drone pilot which rarely will be taken by surprise during a flight... & also better suited to learn even more.