Comment # 23 on bug 957071 from Alexei Sorokin

S. B., no, that is probably not it.
When that button is toggled, this is exactly what happens:
https://github.com/linuxmint/blueberry/blob/1.2.3/usr/lib/blueberry/rfkillMagic.py#L113
That is, "/usr/sbin/rfkill block bluetooth" is being executed wrapped in magic.

Maurizio, can you check if the above command works on its own?