With an image top format for your card it's quite possible that your image aspect ratio nearly matches your card shape -- and that would force the label out of view. Since your phone and tablet have different overall aspect ratios, that's why the label appears on your iPad but not your iPhone. Your card design and image aspect ratio more closely matches the phone, so there's less room for the label to appear.
So either change the image aspect ratio, increase the card height, change the layout grid aspect ratio, or use a different card format. The first three options are how/where you tweak shapes (aspect ratios).
Hi Colin !!! thanks a lot in advance !!! we will try these advices !!!! we missed the navigation system from the old 2014 dps !!! The top thumbnails and the thumbnails slider !!!! Thanks a lot for your answers !!!