I replaced a drive, and the spinning resilvering animation showed up on the top. I got a notification that a FreeNAS upgrade was available so I applied it, and the system restarted. This caused the system to reboot during a resilvering process, and when it came back up online, resilvering continued, but I am only able to check the progress by going into the shell and typing "zpool status Tank." There's no indication in the UI that resilvering is happening. No spinning animation on the top of the page.