switching from speaker to earpiece mutes mic

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This is a strange one , when I switch from speakerphone back to the earpiece the mic mutes but the icon does not show it muting.
the person on other side can't hear me till i switch back to speakerphone then mic works again.. i think it is a bug with the latest software update, never noticed this problem till recently

 

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in process of troubleshooting , I went to list of all apps and I have 3 identical phone apps, 2 of which I can clear cache and data , the other I can clear data momentarily but it comes back, does this mean anything