My mouse shares a Bluetooth dongle

My mouse shares a Bluetooth dongle with the Keyboard and it is dropping out now, needs to be turned off and on to work again, every time I use the the Keyboard.
Staples generic, Cauldron 9ish
I cant find a way to diagnose this, and love some directions to .... ?
Staples generic, Cauldron 9ish
I cant find a way to diagnose this, and love some directions to .... ?