I've been having issues with chromium lately on funtoo / gentoo. I believe it started since version 55 (now I'm running 57). When navigating to google maps, the page becomes unresponsive. I cannot scroll, the input boxes and other elements go from having a nice grey shading to make it appear 3-dimensional to black.
I have no issues with firefox. I suspect there is some sort of X11 issue going on, but I don't see anything in the logs or dmesg.
Oddly enough, google maps is the only site I can reproduce this issue on.