iPhone 14 Pro Bluetooth audio switches to iPhone speaker when microphone is turned on

iPhone 14 Pro Bluetooth audio switches to iPhone speaker when microphone is turned on

I’m using an iPhone 14 Pro with a Bluetooth headset. The Bluetooth audio works normally until I turn on the microphone.

For example:

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• When I’m listening to audio, the sound comes through my Bluetooth headset normally.
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• When I answer a call or turn on the microphone in a game (such as Free Fire), the audio/voice suddenly starts coming from the iPhone speaker instead of the Bluetooth headset.
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• The microphone also seems to switch to the iPhone instead of continuing to use the Bluetooth headset.
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I have already checked the Bluetooth connection and the headset works properly with other devices.

Is this a known iOS/iPhone 14 Pro bug, or is there a setting I need to change to keep both the microphone and audio routed through the Bluetooth headset when the mic is enabled?

Any help would be appreciated.