On Chrome, certain websites will suddenly "hang" while loading. I'll get the spinning beachball, and the only way to proceed is to shut down my Mac Pro with a long press of the power button. It reboots with no crash warning or log report. It's happened multiple times while browsing reddit—the page will load, but while the comment section is loading, the freeze will occur. It's happened on Newsweek.com also. But I can't reproduce the problem with the same page once I reboot; it seems to happen randomly. I can switch programs, but Cmd+Option+Esc doesn't do anything, and the computer is otherwise unresponsive until I completely shut down and reboot. This isn't happening on my Macbook Pro, so I know it's specific to the Mac Pro. Is anyone else having this problem? I can't diagnose because there are no error reports being generated.