Early adopters are used to dealing with bugs (or they should be), but once in a while a hidden problem can trickle down into stable, though rarely are they so funny as this. Some folks are running into issues with Chrome OS Stable v72 and later releases, resulting in crazy high CPU use. The twist? This problem only occurs in very particular, self-fulfilling circumstances: while you have the task manager open.
New Chrome OS bug causes high CPU usage every time you check CPU usage, understands irony was written by the awesome team at Android Police.