Weird vertical bobbing motion when viewing a failed job in web interface

Sometime in the past week, perhaps starting 3 or 4 days ago, the web interface to view a job started exhibiting a strange shaking behavior. When navigating to a failed job for the first time, and then scrolling to the bottom of the screen to view the details of the failed step, the window moves up and down a few times, before settling to a halt. I’m using Chrome on a Macbook Pro.