I know there was a speed limit introduced recently, which means you get 'try again later' at pokestops if you're moving at driving speed. But I get quite a lot of these 'try again later' messages even when I'm walking - what is going on? Does anyone else get this? Really annoying!
Yes, sometimes it seems to happen for no reason :S Worse still, when it does, sometimes it's actually spun the stop but not displayed it and other times it hasn't. So you never know. V annoying!
I get it a lot when my GPS is playing up, and the avatar is running around like crazy.
Seems like you really need to wait for the server to respond and actually dispatch the loot. I spun a few pokestops in a rush and got 'try again later' message