I can't sort playlists by length, on my iPhone or on the laptop. I look it up online and according to posts I should be able to at least on my laptop but there is no sorting/duration icon on my playlists. I see the option to sort it by name, album, artist, etc but no sort by length. It's really irritating because I'm trying to make playlists for certain time periods. Has this feature been removed?
We really appreciate you reporting this and providing us all the relevant info.
We've passed all this on to our tech teams who are still investigating this. While we don't have an exact time frame for a fix, we'd recommend keeping your Spotify app up to date to guarantee you’re rocking all the latest features and fixes.