YTMusic lookup errors for Spotify liked songs despite fallback search option?

[Lenarlot]

According to the project's FAQ, if an exact match isn't found, the first search result should be added. However, I'm getting errors like this when loading liked songs:
Spotify: Shake Your Limbs - Mattafix - Rhythm & Hymns
ERROR: Unable to look up song on YTMusic: Did not find 'Shake Your Limbs' by Mattafix from 'Rhythm & Hymns'

I'm using the Graphical UI and have implemented the modifications from these issues to solve previous problems:
#125 (comment)
#114 (comment)

Am I misunderstanding the FAQ, or is this behavior normal?