This is a very obnoxious miss in the UI because right-clicking on the song in the actual playlist is the only way (that I'm aware of) to easily remove that song from the playlist. So if I hear a song that's terrible and I just want it off the list. I have to scroll through hundreds of songs looking for the one in a green font. This is also a huge miss in terms of accessiblity for those with disabilities as those with color blindness will have even more difficulty identifying the song that's currently when scanning through this playlist for the same reason.
This knowledge just changed my life. I too found it really odd and friustrating that I couldn't pull up a playlist after restarting Spotify. Sorta weird how hidden that features is. I tried everything, but yet somehow never clicked on the album icon. Thanks!