we found some problems in Opus implementation which was causing some static noise added to outgoing audio. This has been fixed.
Google Policy updates restricts some more device permissions: to write native call history and to handle native mobile calls. Apps which are using these permissions must apply for exception from Google, otherwise they can't be published on Google Play. Since these features are off by default, we removed these permissions as well to be compliant. In case you need any of these features, please post a comment on your app page and we'll get back to you.