Until they fix it you can do it maually Like I have... here is the link...go down page and copy the meta tag as it is.. then past using the edit items and put it in the description box before the descrption in html area before description or in the edit field of your items. Be careful if you do it this way in the field area to do them all at once they go on the html area not description or will erase description with the meta tag. Any ? Just ask. Oh you might want to bookmark this page with the tag. Just follow fiction from the link below.
http://www.ebay.com/tools/sell/mobile-friendly-test
