"Nearby list and spawns disappearing without timing out"

#PokemonGO: I have a had a problem since the last update. Fairly often, my nearby list will go completely blank without being replaced by sightings or the text indicating no spawns in range. This can happen right after the app opens or after it has been open for some time.Starting today, I've also noticed that Pokemon will spawn on the screen and then disappear after I close the app. This happened both on lures and a normal spawn. I closed the app and reopened it to check if the spawn has simply timed out, and they appeared again and then immediately disappeared again.Any suggestions or other experiences for this issue? I'm playing on an Android device. via /r/TheSilphRoad http://ift.tt/2o4lorP