I use bluetooth mouse and bluetooth headphones with my XPS 15 9570, and it's REALLY annoying that the BT stays active when a laptop is asleep!

A slightest mouse movement would wake the laptop from sleep.

The laptop even connects to my BT headphones and hijacks the connection when I'm trying to connect the headphones to my phone, WHILE it's asleep! So, I have to open the laptop, turn the BT off, and close it again, just so I can connect the headphones to my phone. That's ridiculous!

The underlying problem is that the Bluetooth stays active while the laptop is asleep. Why would anyone need that??

Dell, pretty please, can we at least have a BIOS option to deactivate BT during the sleep for laptops?
Or is there any other way to deactivate Bluetooth during the sleep? It's a serious usability problem for people who use Bluetooth devices.