I think that means the thermostat is failing. Do you have a tune and did you try updating recently?
This is a common "glitch" so to speak in this car, but if it happens a lot then I would think something like the thermostat is on the way out.
I would first upload fresh firmware and updates on your tune. Don't forget to reset adaptations. If you dont have a tune then something is likely going to fail soon.
Check your coolant level too.
If you do replace the thermostat I would replace the water pump too at that mileage.