If you mean if you search for an album, click the album (its not a playlists) it does not have a shuffle play button for me either :p i think it might just be for free users, you can always save it as a playlist and then it will have a "Shuffle Play" button at the top.
Hope this helped :)
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You can go to the album cover view by clicking the cover at the bottom left of the screen and select shuffle from there. There is an idea here to add the shuffle button to all pages here although I do think it takes up too much space on a small screen :)