Home security system hacked??

Hello, is anyone else having issues with there xfinity home security system. I noticed something the other day on my video footage that lead me to think that the Integrity of my security system has been compromised. I'll try to explain what I saw. So basically I was watching the live stream from my xfinity security camera when I heard my front door open and close  but the area where you can normally see my door had become all blurry only for a brief few seconds until the individual who had opened my door was able to get out of the area my ca.aera covers. I feel that the safety of my family is now at risk and also the feeling of being protected by xfinity home security system is no longer what I feel. I need help getting these hackers off my system or need a  way tk keep them from corrupting my video feed.  Please help

With Much Regard

-Xfinity home security loyal customer