Galaxy S6 :: Can't Open Microphone Error On Google Search

Sometimes when i click microphone on google search, i get "Can't open microphone" error. First i tought it's about google app but it is not.When i tried to call a friend on Viber he couldn't hear me and i realized it is about all applications which uses internet.To be sure, then, i tried to record voice on Facebook Messenger, microphone didn't work.On skype didn't work.

Then,i called somebody on gsm network, microphone worked. I tried to record my voice on local application, microphone worked.Again, i tried all applications which uses internet, no luck.

After some minutes microphone acts normally.I mean it works everywhere. I couldn't understand when it works normally or according to what.

When i have this case, killing all apps and reboot phone not working.

Oddity is that my friend had Sony Z3, she has same issue.Microphone sometimes works sometimes doesn't work. So, i started think that maybe one app that we both have, always occupy the microphone and doesn't let another applications to use it. But why i can make calls on gsm network or record voice on local apps. Maybe they have higher priority on using microphone(?).

It sometimes works, sometimes doesn't. Now, i did a list of apps which uses microphone and i will try to delete or force stop one by one when i have this issue.

Another friend who has Sony Z3 has exactly same issue. So far, 1xGalaxy S6, 2xSony Z3