[Android] Local files downloaded on Spotify app but won't play

[Jotatoe]

I've recently moved from an Apple iPhone to the Google Pixel 2 and it seems that this issue is only exclusive to my Android device.

The local files added through my PC can be downloaded onto my phone but they just won't play. The player simply skips to another track that was added via Spotify (i.e. non local files).

Is anyone else having this problem too?