Weird scrolling lines in video while using Akaso EK7000 in low light
that's the frame rate and electricity frequency

Ill bet if you filmed at 1080 25fps you would get the same result. Im going to assume you are based in the US which uses the standard 30fps which is why your 1080 footage does not show it as 60fps is a multiple of 30fps but 25fps is not which is why you are getting the banding.

Hope that helps

FYI there is nothing you can do in camera unless the 4k offers a 30fps (or multiple of) to avoid the banding when filming with standard household lighting