When I click to open my gmail app, instead of opening into my inbox, or opening the last email I was looking at, it usually opens some random old email. Then every time I open it the old email will be the first thing that shows up until I restart the phone. Then it works ok for a little while, but eventually it "picks" some random email thread and will always open in that one. Anyone else have this issue? Know how I can get it to stop?