Make the "Sort playlist" function independent between playlist

I basically have two types of playlists: for some I want the songs to be in a specific order (Default sort + manual sorting), and I usually don't add songs to those playlists after creating them; for my other playlists, those I add songs to regularly, I need them to be in the "Recently added" sort. Here's my issue: with how the "sort" function is currently implemented, I can either sort all my playlists as "Default" or as "Recently added", meaning I have to change the order everytime I play another playlist. Why couldn't the sort only apply to the current playlist, and stay that way? You would only have to select the appropriate sort once, when you create the playlist, and then you're done.