This happens to me only when I run CoreELEC Module Drivers, so I can’t reboot the TV Box. Fortunately in my S905X3 the kernel recognizes my old ec168 USB TV tuner device with no problem and no need to install CoreELEC Module Drivers, and in my S912 the tuners have been installed for many months. It was hard for me to find the cause of the problem that occurs in both Amlogic and Amlogic-ng firmware.
I think something is wrong in the CoreELEC Module Driver addon or in the Drivers addons.
(Tested on TV Box S905X3 and S912)