Disable Sideways Flight is On. In the dark, the sensors turn off. After that, the side flight lock stops working.

If the sensors stop working then i can see why sideways flight lock would be disabled

Hi there. Thank you for reaching out and we're sorry for the trouble. Can you please confirm if you did experience this issue during the daytime? In addition, kindly please try to recalibrate your vision sensor using the DJI Assistant 2 software consumer version then check if the issue persists. Please keep us posted. Thank you.

If there is light, then the sensors work and the lateral movement blocking works. If you turn off the light, the sensors turn off and the lateral movement lock also stops working.

Does not operate at night - "Disable Sideways Flight"

If you switch to the "Sport" mode, then the sensors will also turn off and the Drone can also fly sideways, with side flight blocking enabled.
Do you need to make a video for this or is the problem already clear?

The reason lateral flight is disabled when collision detection is on is because there are no sensors on the sides hence only forward or reverse flight is guaranteed to be safe.  If collision detection is off after dark, there is no reason for lateral flight to be disabled because you are no longer using collision detection.  I understand what you are saying but it's not a "problem" really.

Element115 Posted at 11-4 14:09
The reason lateral flight is disabled when collision detection is on is because there are no sensors on the sides hence only forward or reverse flight is guaranteed to be safe.  If collision detection is off after dark, there is no reason for lateral flight to be disabled because you are no longer using collision detection.  I understand what you are saying but it's not a "problem" really.

If I turn off side flight, then it should always be turned off.  And it turns out that in difficult conditions, lateral flight is turned on, so that it is even more difficult for the pilot.