So, needed some time to get my available HW ready for flashing I disabled the watchdogs. And the first two tests were absolutely successful and I thought thats it. But the third time was unsuccessful: the screen stayed black after loading ubi kernel and no charging happened. Tried a few more times and 50/50 was okay/not charging. This time I needed to push power button for 8s, as no reset is done. Pulling/plugging USB did not help, a real power cut was needed. I think due to no-lifeguard-reset? So in general no change, but the symptoms are different! Same to the plus_nat kernel. No change here: screen stays black and needs power cut. Some else info I could provide?