With both Christmas and Halloween outfits, from the collections view, you can't tap on the nerf/buff to bring up the tooltip of what it does if there is another owned outfit to the right of it. You also can't bring up the tooltip of the buff for a seasonal outfit if it is in the top row of outfits for an LP and you own another outfit in the second row directly below it or below and to the right of it. It appears the tap areas overlap a bit too much or are mapped strangely. You can of course tap the outfit to view it and view the tooltips from there. Have only tested on an iPhone 6S.
Nope, mine works well on a iPad mini. Maybe you just have fat fingers? Sorry to revive this old thread.