A new card did the trick, exactly same brand (Verbatim) and I now got 2 working H5 board running Node-Red and MQTT on EMMC, and since both H5 boards did the same, I blame the card, maybe being worn a bit from moving around in boards the last couple of years, and yes I need to read more in here so I dont ask questions that are already answered
The card btw runs fine on my Raspberry 2. And again thx for the great work, I'm one of those that doesn't need SATA, HDMI, and all the other stuff, just as long as I can access the board with ssh, I'm happy.