Hello, I'm sorry I spelled the name of the box wrong. It is S905D - sml5442tw. Yes my box is from O2.cz i have a few pieces unfortunately they are discontinuing support and without paid services from O2 the box can not be used so i am trying to reflash to Libreelec to be able to use them further. Yes... tried searching the internet for something regarding this reboot reason at the end unfortunately I couldn't find anything anywhere. Sure I can send the boot output from Armbian here it is.