I had friends test in libra wolf, edge and chrome. Seemingly only chrome had no issues but the same bug still happened on the installed game so it might not even be a browser issue. As for what actually happens, the screen starts shaking slightly and then increases quickly until the shaking is so violent the game becomes unplayable. It pretty much just throws your camera off screen so you cant actually see whats happening.
One of my friends did see the second enemy type but this was on the dirtpay.exe as this was the only version of the game where the previous bug did not happen to him. Although im not sure if that bug is actually present in that version or not. He was also the same one who ran into the invisible blocks.
