Site CSS seems to behaving oddly

For the last hour or two, certain portions of the site won't render correctly in various browsers. A refresh doesn't immediately fix it, and requires several more before it does. Such as the post window being extended way below the site's footer. Or the user postbit being blank but the post table having the composed post. Refreshing doesn't fix it but quoting the post does fix it upon scrolling back up.

Issue shows up in Chrome, Firefox, Firefox Developer, Vivaldi, et al. on more than one computer.