Bluetooth headset does not work when wires is plugged in

My blackberry is attached to a home phone via bluetooth. I need to have the cell phone in a certain area where reception is good.

In the old one (OS7) , leaving the headset plugged into the cell phone didn't seem to be an issue. On Q10, while the calls do get routed to Bluetooth, the voice/mic don't transfer when I pick up the home phone, which basically acts as bluetooth headset.

Anyone have a fix?

P.S. Apologies for grammar error in the subject line :(
Thanks

So it rings thru to your home phone just fine correct? what does it show in the BT menu when they are connected?