Multi-camera board signal integrity issues / corrupted camera image

[pylorak]

I have an ArduCAM Multi-Camera Board v2.2, connected to 3x ArduCAM IMX708 (Camera Module v3), bought directly from UCTRONICS.

The cameras "work" in the sense that I can switch between them and make videos and pictures with each of them when connected to the multi-camera board. However, all of them experience serious and frequent image defects and corruptions. These range from horizontal lines in the image to up to half of the image being discolored or blanked. All cameras are connected using the supplied 15cm cables by ArduCAM.

See attached video for demonstration.
ArduCAM Board Image Defects.zip

If I connect any of the cameras directly to the Raspberry (Pi 4 B) without the multi-camera board, the images are perfect without any defects or distortions. In fact, when connected without the multi-camera board, I can even use a long 50cm cable and the images are still perfect. However, as soon as the cameras are connected over the multi-camera board, even with the short 15cm cable, the image defects come back.