Comment # 23 on bug 1004830 from Sebastian Parschauer

Okay, I've found the bug in the gnome-settings-daemon. It only sets these
properties at startup (see: plugins/rfkill/rfkill-glib.c,
cc_rfkill_glib_open()). So USB Bluetooth dongles must be connected when
starting the GNOME session.

This is not really how USB is intended to be used. My expectation was that I
can connect the device when I need it and keep it disconnected when I don't
need it. I have especially the current Bluetooth kernel stack CVE in mind.

With the dongle connected at startup it works.