Can no longer play audio files while phone is locked or if I switch to another app

I have many audio files stored in the app which I like to listen to while my phone screen is locked or sometimes just using another app where audio from Aloha is playing. There seems to have been some sort of visual update in the past day or two that has had the effect where I am no longer able to do this. The moment I lock my iPhone music stops. The moment I switch apps music stops. Aloha Browser 3.3.0 and iPhone 7 software 14.7.1