Reverse Camera - White Screen When lights turn on

I wired in a dash cam / reverse cam into a 2004 Ford Fiesta.

The cameras work fine except the rear camera turns completely white when I switch on the cars lights.

The reverse camera receives power from the dashcam normally and receives power for 4 LED’s and to trigger the camera to display on screen via the reverse light. I have the camera wired to the reverse light +12v and the ground on the rear light loom.

Any ideas why it whites out when the lights are turned on?