Update-07/27/17-
While it is great that Niantic has stated that the problem I listed below is a real bug, nothing has been done to correct it, and its causing me to miss out in capturing new Pokemon. Today, I lost a 1200 CP because I could not access the berries. Also, it turns out that I cannot use my incense. It wont start! I tried a friends iPhone on the same Pokemon, and they had no problem using the berries. This appears to be an iPad problem. Come on Niantic! Not everyone uses iPhones!
Shortly after the latest update, the one introducing Raids to the system, I reported a bug involving the use of berries. Basically, the berries just sit there. They blink a little. They hop a little, but they will not attach themselves to the Pokemon you are trying to use them on. The Niantic Support group was great. They got right back to me and let me know that this was a bug and they were working on it. I realize they have been busy with the Anniversary release and Raid roll-out, but this problem still persists. There are players like myself who are not necessarily interested in the Raids and battles. We just want to "Catch them all". Were collectors. And that is whats fun for us. Now, however, because of this problem and the fact that PokeStops do not generate as many Pokeballs as they used to, its beginning to feel like a waste of time.
L.I.Baker about Pokémon GO, v1.39.0