Yes, I noticed the same thing. It appears to have started (in my case) around August 15.
August 20, 2019 15:04 PM
Everything about eBay's message system is dysfunctional and broken and has been for years. The way eBay is going now it's probably even gotten worse. Nothing will ever get fixed. Same with everything else on eBay. They have incompetant pragrammers.