handfree mic not working on skype calling

after update 5.1.1 my Z2. when skype calling with handsfree mic other one cannot hear my voice but loudspeaker mode work good. and other normal calls, viber calls work perfect with handsfree mic. this issue only for skype calls.
I downgrade my phone 5.0.2 now skype call work perfectly. Is there any way to fix this Issue