hI @DannX, Sorry to hear that experience.

This problem can be related with your device so I’m suggesting the following step:

If you are using the battery saving mode on your device, turn it off while you are carrying out this test.

• Open the Deezer app Gearwheel in the top right corner Data and storage Clear all.
• Stay on the Data and storage page and under Smart Cache, slide the marker to the left so that it reaches 32Mb, then slide it to the right to reach 2GB (you can move it up to 10GB if your device has that much storage).
• Tap again on the Gearwheel in the top right corner Log out at the bottom of the page.
• Turn off your device for a few seconds then turn it back on.
• Log in to Deezer with your email and password.
• Stream a few songs and navigate in the app.

Your Downloaded music on Deezer will be deleted, but you can easily download your favourite playlists and albums from your Favourites.

If the issue persist you can uninstall the app and install the app Deezer:

• Uninstall your Deezer app. Don't worry! It won't delete your favourites.
• Turn off your device.
• If you've a SD card, remove it. If not, go to the next step.
• Turn on you device.
• Reinstall Deezer via Google Play.
• Open Deezer Log in with your email and password
• Download one album or playlist, and stream a few songs or navigate in the app.

Only once you followed all these steps and you're sure your Deezer app is performing well again, you can insert back your SD card.

To get more information you can also access this link