Swipe to queue does not work

[katemoo]

Plan

Premium, student

Country

 USA

Device

iPhone X

Operating System

iOS 12.1.2 (latest version of Spotify installed)

My Question or Issue

This occurs more often when I’m offline, but when I’m listening on my phone and swipe right on a song in my library to queue it, the green queue symbol shows up alongside the song, but it is not queued (the “song added to queue” message doesn’t show up either). No matter how many times I swipe right (and how far), the song is never added.