I was using version 7.8.0 and noticed the same issue. I had since updated to version 7.9.0 this morning and the problem was still there!
All other plugins and WP core were up-to-date as well.
Anyway, I’ve reverted back to version 7.7.2 and I’m continuing to monitor it… so far, so good as there has been no messages appear on the product pages and the error log is clear…
However, could someone from Woo let me know when this issue has been properly resolved?
Kind Regards