Phone thinks it's Bluetooth connected after headphones are unplugged

This problem started after I started using Bluetooth headphones regularly.

Here's the deal.
I had Bluetooth headphones connected.
Now I disconnect and turn Bluetooth completely off.
At this point I can play audio over my phone speakers fine with no problem.
Now I plug in my regular headphones through the headphone jack. Sound is still fine.

If I unplug the headphones now, the phone magically thinks the audio is supposed to come from a Bluetooth device and shows me the +/-audiobar with the...

Phone thinks it's Bluetooth connected after headphones are unplugged

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