Latest update has major bugs

The latest update to Pokémon Go has two major bugs for iOS. The first is an issue with sightings and Pokemon, where any motion or GPS drift can cause the sightings and Pokémon to disappear and reappear and disappear again at the most inopportune times. The second issue is with gym battling, for those who still bother with the gym system. The game can be fun, but Generation 2 Pokémon are fewer and far between. Eggs mostly hatch old Pokeys, Gen 1 region locked pokeys are still not available everywhere, and all legendaries are missing.

gjb140 about Pokémon GO, v1.29.1