Hey @glasg1la.
Thanks for getting in touch!
Let's try a quick reinstallation first. You can read here how. If it doesn't help, could you please send us over the URI of the track. Let us know as well at which point the playback doesn't work properly anymore.
You can find the URI when going into the Share menu on desktop and then choosing Copy Spotify URI.
Let us know what you can find. Looking forward to your reply.
Have a nice day!