Inernet radio on smartphone

I am using "Radio FM" an internet radio app on my Android phone while connected to wifi.
It regularly cuts out, sometimes for a few seconds, but sometimes permanently until I reconnect to the station in the app itself.
Its not the wifi, the internet is still working on other devices.
Is this something I should talk to UPC about? They are my provider.
Or is it likely to be the app?
Or is this likely to be the actual radio stations problem, I assume the app is just connecting to the "Listen Now" part of each stations website.
Any good recommendations for an slternative app?

Id recommend TuneIn Radio. Even with this you have the odd problem and I would suspect its with the actual radio station and not your service provider (ISP).

I've been using this https://radioplayer.ie/ for a while without problem

I find this happens regularly with individual stations apps when I'm using the 'Listen Live' options. I just assumed it was the 'buggy' nature of those apps and not necessarily a problem with my Wifi. Would be interested in others opinions though.