I've made my first build for OPiPC+ with 5.3.0-rc3 ...
Things are not looking very good : Wifi 8189fs is crashing, but eth0 is working.
I will investigate more ...
RC7 with full armbian 5.96 .debs also has these freezing temperatures on the OPi One:
Debian Buster with Armbian Linux 5.3.0-rc7-sunxi
package bsp-kernel[5.96] u-boot[5.96] dtb[5.96] firmware[5.96] config[5.96]
root@opi-one(192.168.6.114):~# armbianmonitor -m
Stop monitoring using [ctrl]-[c]
Time CPU load %cpu %sys %usr %nice %io %irq CPU C.St.
17:21:49: 1008MHz 0.63 19% 10% 8% 0% 0% 0% -208241°C 0/4
17:21:54: 480MHz 0.58 0% 0% 0% 0% 0% 0% -209451°C