"Possible new tracker counter measure and a warning to people chasing Unown"

#PokemonGO: My local chat group are noticing that without warning Pokemon that already spawned in suddenly change to something else before its despawn time despite no change in weather.Several examples were observed in the last week:Slakoth > SpoinkUnown > ZigzagoonSlakoth > GulpinIt should be noted that the pokemon that replaced the former would retain the same IV as the former and would despawn 30 minutes after the former spawned.I personally never experienced it but the change of Unown spawn really caught a lot of people by surprise. via /r/TheSilphRoad http://ift.tt/2BB3X9r