Comment by aembleton

On Android, or at least on my Pixel - toggling on Airplane mode switches off Bluetooth and Wifi, but if you then switch on Bluetooth and/or Wifi whilst Airplane mode is on then next time you go into Airplane mode those will also stay on.

It provides UI feedback that this is happening through the Bluetooth and Internet switches, but thats only because I have those visible. If they're not visible then I wouldn't see whats happening.