Bluetooth devices are randomly disconnected

Yes. Switching that to the off position will prevent BT from being disabled when on Notebook Computer Battery.

For all wifi/radio:

sudo nano /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf

The default:

[connection]
wifi.powersave = 3

Change the value to 2 so that it is exactly:

[connection]
wifi.powersave = 2

Tap ctrl+o to overwrite, then enter key to save. Tap ctrl+x to exit the editor.

Do you mean by this that BT is now behaving properly and may have been addressed in a recent updated package?