Southpaw changes to default

Hello, small thing from a small group of players.

For the last six months, I've changed from default to play southpaw lefty inverted. And ive noticed in those six months, that occasionally (once every two or three days) that the southpaw setting, will change back to default. Most of the time, I notice it on my first game. But very rarely, it will change between games. 

Thank you for your time, and patience reading this.