I have a couple of times mistakingly diselected the "download" option of a playlist in my iOs device when wanting to press play instead.
When noticed, I have immediately selected the "download" back right but the whole playlist starts to download from 0.
This is very frustrating specially for big playlists that you have to wait to download again for a couple of days having the app opened and connected to wifi.
It would be great and useful if when I diselect the "download" option to have a Pop-up Warning asking "Are you sure you don't want to have this playlist downloaded to your device anymore?" (or some warning)