In app I also changed audio session category and options. May this affect on open ears?
Absolutely – making changes to the audio session, having other audio and video objects working simultaneously, anything which changes the session at all will affect OpenEars because it has required session settings. It’s possible to overlook something if you have other SDKs in use – safer than commenting things out would be to create a really simple implementation based on the sample app and see if it is still happening.