Bright flashes on transitions from shade to sun

I just rode the Big Foot Hills course and about 24 km in (on the part overlooking the city), I noticed a graphics problem… every time my avatar emerged from a shadowy part into the sunlight, the graphics were overexposed, resulting in an almost blinding flash effect. I’ve never seen anything like this before and didn’t manage to grab a screenshot, unfortunately. It was so distracting that I had to stop my workout early. Has anyone else experienced something like that?