I've seen some older forum posts on this subject, and I assume they are closed since I can not comment. Seems to be an ongoing issue with the Xfinity Stream App for android. Where bluetooth connected headphones, or speakers have audio lag. From the older posts it seems that people are explainng that as normal when it is not. Multiple other apps do not exibit the same behaviour. YouTube, Play Movies, Netflix, and Hulu all work fine with my Pixel Buds. There is a very noticeable audio lag issue when watching downloaded shows from my DVR in the app. Please open a ticket with engineering, or your app developers to address this issue. Once everything goes wireless you are going to have a lot more people complaining.