That's absolutely not normal for sure. Are you using any third-party packs or plugins? If so, you'll want to try disabling each to see if it is causing issue. You can enable/disable plugins from the plugin manager located on the Options > General tab. You'll also want to try just opening a blank profile to see if that makes a difference.
Something else to try (just a long shot) is to go to Options > Audio and change the audio type from 'Windows Media Components' to, 'Integrated Components'. The former has been causing other small issues lately (the latter will become the default option in later releases).