I use the Pine64 installer and the images work for me on the SD and on the emmc card. maybe you are testing the pine64 installer or etcher as recommended by pine64.
Thanks for the suggestion. I get the same results. I can use the pine installer and run Ubuntu and it is real laggy, but runs, no kernel panics. I use pine installer to write LE and I get the same boot kernel panics and poor video playback.