Problem in encoding MVC with 2 RGB4 Input streams

I used the 2017 SDK R1 with the following command:

     sample_encode.exe mvc -rgb4 -i L.rgb -i R.rgb -o BRGB.mvc -w 1920 -h 1080

The ouput file has "noise" on the upper half while playing.

But the display will be ok when I encode each file separately with the following command:

     sample_encode.exe h264 -rgb4 -i L.rgb -o BRGB.mp4 -w 1920 -h 1080​

Furthemore, the display will also be ok when I convert L.rgb and R.rgb into L.yuv and R.yuv then use the following command:

     sample_encode.exe mvc -nv12 -i L.yuv -i R.yuv -o BRGB.mvc -w 1920 -h 1080

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I would like to know is it possibile to use RGB4 streams to make a MVC file with correct display?

Thanks,