Problem with 4.4 call audio with headset

Hi everyone!

I have this annoying problem with every 4.4 ROM on my mi2s:

With wired headset connected to the phone, in a call, I can hear what people are saying but they can't hear me at all. I always have to unplug the wired headset in order to talk to my counterpart.

Anyone have a clue about this?

Thanks in advance!

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