I had 15 listings appear on my Seller Hub Task List under Auto Relist System Error.
Dates errors occurred: April 26 and April 28.
Error stated as: The specified UUID has already been used.
I checked and found all 15 items had automatically relisted on the dates they were supposed to according to each listing's ending date.
If I had followed eBay's recommendation to relist manually I would have received 15 duplicate listing policy violations.
I marked these as "resolved" so they can no longer accidentally be manually relisted.