So I have been trying to check/clean up my listings to make sure that they are "mobile-friendly." The checker utility on eBay seems to be working again - YAY!
However, if you're using it, find your listing isn't compliant, click on the "Fix It For Me Button" to remedy that, BE SURE TO SCROLL DOWN THE SCREEN AND CLICK "SAVE."
In eBay's infinite wisdom, the "Save" button is placed "below the fold" which means it wasn't visible to me on my screen or quite possibly to many of you. If you don't click save, even though you've run the checker and "fixed" the listing, the "fix" won't take effect. 😞