extending rear camera cable

Hello, I bought an extension cable from aliexpress, and today I installed it. When connected, the front unit started to change continously resolution and to freeze. I checked the new cable and was ok (no short, resistence below 1ohm). The camera worked without extension. Why? How can I fix it...

Three years ago I posted photos of the fitting of front and rear Mini 0803's in my Volvo XC60. Recently I replaced the batteries in the 0803's successfully, but thought the capacitor and combined rear camera in the 0906 would do a better and more reliable job. The fitting of the rear camera...