Yes, sorry for the delay in response, but this was it. I had a backup run during the rebuild, and it paused it, causing the timer to restart from zero.
Is there any reason that the rebuild timer would start over after it reached the size of the smallest drive in the array? I’m currently rebuilding an 18 TB drive and started the process 20 or so hours ago. Woke up just now to Unraid saying elapsed time is 3 hours ago but at 71% with 12.9 TB rebuilt. It looks to me that it “started over” when it reached 12 TB but I’m not sure if this is expected behavior. No errors AFAIK either.