done a few more ( approx 6 ) till now and all looking good, will start with cold boot early morning to see how things go and give a few more reboots after that. but seems to be fine on this H6 board, over to topic : OrangePi3   [EDIT] Meanswhile executed reboots and cold starts, OPiOnePlus came back OK all the time ( kernel 5.9.16 ) [/EDIT]