Why does the wired keyboard and mouse turn off on Android?

Question

Android

Bought Hub OTG Usb. Three Usb mothers, a micro Usb for connecting to a tablet, and a micro Usb for charging.
I connected a wired (normal from a PC) keyboard and mouse. After 5-10 minutes or the mouse cursor disappears, but the mouse itself is highlighted. Sometimes the keyboard turns off.
Sometimes the tablet goes to reboot.
Tablet Android Irbis TZ101.
I went through a lot on the Internet, and there were a lot of tips. Up to the point that the tablet does not have enough power and buy more powerful charging.
P.S. By the way, charging works through the Hub even when OTG is on, although the specialists said that this is impossible for Androids and IOS.