Did you find answering and ending calls?What all options are showing there ??

I hope this helps

1. Go to Settings.2. Tap on Accessibility.3. Go to Interaction & Dexterity (on some models under “Call Settings”).4. Find “Answering and ending calls.”5. Disable any options like:“Automatically answer calls on speaker”“Answer calls using speaker by d...

Try to reset Bluetooth settings. It worked for me :)

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