Game Blurs after 5 minutes of playing

As the title said, after ~5 of playing and I try to open the inventory, the game just blurs, I guess this is just me getting disconnected but the animals still move.
Is this really just lag or is it the game that’s screwing my game up?

Also i’m playing on a Mac, just so you know.

BUMP.

I got the same problem and i’m running it on a Mac too.

PS : We need a Retina resolution…