Stream App volume fluctuations  (low to really loud)

For the past maybe month or so there has been some very annoying and concerning volume fluctuations watching the stream app through Roku. (multiple tvs, multiple channels). It corrects itself when I hop out and go back in however late at night when I am sleeping and the volume skyrockets it wakes me up and in some instances starts to crackle my speakers being so loud. Other times it reduces to so low that it can't be heard. 

I have rebooted devices, reinstalled the app, checked app and Roku for updates. All that seems to be on the up and up. This is not at commercial breaks as used to be with comcast in general, but during shows, and even the music channels.  This is very annoying and now looking at sound bars with the capability to balance those fluctuations (ie DRC) if it is even possible.  Any help is most appreciated.