Something odd going on with image optimization at WPT

In the past I’ve always grabbed WPTs optimized version of images, loaded them in place of the failed one, then the system picks up that change on the next test.

Today that’s not working - I have loaded the “lossy” image and even though the test picks up the lowered page load kb, it still flags that image as being the old one from before and “thinks” you didn’t make any change, with you click on “Analyze JPEG.”

Any clue on this? I have tried it with several browsers, same results.