Audio problems when casting

When using the app and casting to chromecast away from home my audio is breaking up. It's not my laptop, it plays fine on there. It's not the chromecast, because all my other apps cast fine.  Not the wifi, well cause everything else works. The only one affected is Xfinity. I have used this computer and chromcast for several years, never had a problem till about 6 weeks ago. Need help, it's driving me crazy!!!