The filter button no longer works. Any fixes for this? It's getting very frustrating

[ivel33]

Running the latest version of Android on my galaxy note 9 and I can no longer use the filter button. I have no other apps running, I've reset the app, and the phone, I am not using my blue light filter. 

I am unwilling to reinstall the app because it usually deletes my saved music

I have endless problems, for an app I have paid for for 6 years? Uncool.