In a dark environment, when the brightness is set to the maximum and then gradually lowered, your eyes need to adjust to the light changes gradually. During this process, your eyes will feel uncomfortable with the screen, so it's recommended to enable the Automatic brightness function. If the adaptive brightness setting is not comfortable for you, you can manually adjust the brightness to prevent discomfort.
Note:
If the screen flashes, crashes, or goes black when using the third-party APPs, it is a problem with the third-party APK, not the phone itself. At present, we have contacted the developers of the third parties, and it is under optimization.