This may be more of an optimization than a bug, but right now the beams in our workout pavilion appear to glow when you get 10+ meters away - they're not really glowing of course, but not being properly shadowed. What's odd (if it's truly an optimization and not a glitch) is how they all change simultaneously - you'd think it would be a function of distance from the camera, in which case they'd transition from dark to light one at a time. You can see what happens in this video: https://photos.app.goo.gl/GuZpeg8XVFWbULx63
To my knowledge, this behavior wasn't present in earlier versions of 2.0 (or at least 1.96 beta versions leading up to the 2.0 release). I've attached an older rendering (from 1.96 I think) as well as a current version to illustrate the difference. I've turned ambient brightness down to 0, which I believe was the default in 1.96.