Yes, the absolutely are. I had this happen soon after an update. They type of device shouldn't matter. If it does that is a problem with the program software. It should work the same on all devices.
Now the icon is completely gone on my game! There was approximately 4 or 5 days left . You need to give everyone the prizes for free because of all the glitches. The last one had a lot of issues the same as the above issue and now this one is gone.