Recently I was driving behind a Tesla and it suddenly started braking for no reason at all, I almost rear-ended it. I think it had something to do with the sun

Recently I was driving behind a Tesla and it suddenly started braking for no reason at all, I almost rear-ended it. I think it had something to do with the sun reflecting on the road surface brightly because I noticed this reflection just as I was driving past where the car suddenly started braking.