...after a few minutes with the new build, while trying to play a little video, the usual message appears "unable to play...unknown format.."

With kp48 and the same voltages this issue is not present.

Also setting a lower limit of 125Mhz the kernel seems to ignore it and the lower used frequency is always 250.

Setting 250-805 the strange behavior is that the most used clock is 500 mhz....