Since Deezer connect has been out, I might have been able to use it for a few minutes maximum before an error occur.
But usually, the initial connection will just make the app and the website going wild before it gets stuck (or crash).
Here are two examples with Brave (Chromium) on Linux on my PC and Deezer 7.0.22.19 on Android.
https://mega.nz/file/hD0BmBaL#ZjDRQ55ht-Hw-wdXfAjZa2SBbP0WJPQz6AmXHoow0Is
https://mega.nz/file/0C82ADAR#xseFonM3LChJuc8GL0BD19h5tv3XOQawUwYKhidX6d4