Hello i found it on both my Opi PC+ and Opi Plus 2E , Both  ARMBIAN 5.59.180918 nightly Debian GNU/Linux 9 (stretch) 4.14.70-sunxi.   As i get some stability issues with Jeedom i'm playing with frequencies and governors and found that strange thing :   root@orangepipcplus:~# cat /etc/default/cpufrequtils && cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies # WARNING: this file will be replaced on board support package (linux-root-...) upgrade