YouTube audio problems in app for Android phone.

I’m having trouble with sound in my YouTube app on my BLU R1 running Android 6.0.1. The sound stutters and cuts in and out. This only happens in the app. I can go to YouTube in my web browser and videos play perfectly with no problems. I can also watch videos in other apps with no sound problems. I’ve tried clearing the cache in the app and also reverting back to the factory version, but am still having problems with sound in the app. It worked fine until the last week or two. Does anybody have any suggestions? Thanks in advance.