Thumbs Up/Down on Lockscreen Only Available on First Track??

[Macatron]

I used the radio station feature on Spotify for the first time in a long while. When I launched my station, and locked my phone I noticed that I was able to add a thumbs up or down right from the lockscreen (just like iHeart Radio). This is a feature that I haven't noticed on Spotify before, so, naturally, I was excited to see it as an option. However, after the first track played, this option disappeared. The button that is used to bring up the thumbs up/down menu was replaced by the track back button. Now, granted, I understand the need to be able to go back to a previous track, I'd also love to have the ability to thumbs up/down from the lockscreen. Is this just a bug, or will this eventually be a reality? Thanks!