There were reports of Wireless and Blurtooth devices being activated/deactivated by their drivers.
Also, my Bluetooth rechargeable keyboard was doing
exactly what you describe.
I disabled the option to Turn It off in Device Manager.
That fixed it,
Note that you will have additional battery drain by doing this.
In Device Manager, find your device.
Look at the “Power Options”.
There is a lot of posts concerning your problem.
See what you you can find.
Reply back if still needing help.