Lost Connection

Any one else experiencing the occasional lost connection that never returns?  For me it seems to happen when I put the game down for 15 minutes or so, come back, do something like race, and then it dies.  It tells me to check my connection but it's not my connect at fault.

I have tried turning off Wifi and turning it back on to no avail.  I haven't found anything to reconnect except getting out of the game and restarting.  Of course I lost whatever I was doing.