I go out searching for Pokemon with my brother and when a Pokemon appears, it would show on his device but not on mine. So then I close the Pokemon Go app and start it up again, and then the Pokemon appears. Why is this? Is there any fix? I have a Samsung Galaxy s6 edge, and the main problem with this, is that after restarting the app many times, it seems that I get a softban so I cannot use my account for around 1 hour or so.
From the offical reddit site:
I can't see Pokémon but my friends can? (OR) I can't connect but my friends can?
Servers are very unstable at the moment. Some players can connect while others can't. Check your time and date settings to make sure they are correct (you may have to toggle time settings to Automatic syncing). This also might be a compatibility issue with certain phones or services having better connection than others. There is nothing you can do at the moment. (see support below)