First off, kudos for providing a screen shot AND an item number - it is critical info to see what might be going on
🙂It may be a transient eBay Seller Hub glitch, or it MIGHT be a manifestation of recently increased eBay enforcement of listing description policies regarding links and content.
(a visual look at the frame source shows nothing obviously wrong with you description except for a couple of really crazy mangled, incorrect links to Inkfrog that could be confusing the bots, and a lot of external css, some of which like the googleapis one may be a violation as it is not a direct css call)
A couple of partial scans using
http://www.isdntek.com/ebaytools/ActiveContentScanner.htm showed nothing amiss, but that isn't conclusive proof that eBay bots don't see something.
It appears lately that those sellers using external listing services/management like yourself may have been sliding by in the past when it comes to those listing description policies. as eBay focused on the SYI individual listing form interface first, throwing warnings at edit or list time, but didn't appear to look at listings uploaded by third party services. It seems they may be catching bulk uploaded listings after the fact now, slowly, but surely in various ways (the Seller Hub revise routins for one)
It's possible that there is something in violation that was allowed by Inkfog and eBay in the bulk upload, but is now being flagged by the new routines in Seller HUB.
A way to test this would be for you to start a normal, small seller "Sell similar" of item 392097721318 using the Advanced listing form and see what errors it throws if any. You would need to change the title and maybe a couple of details to avoid a straight up duplicate listing, and you can probably make it a scheduled listing so as to not have it go live, but still obtain and warnings or error info.
I think this should work (nobody but you can utilize that URL since it's your item):
http://cgi5.ebay.com/ws2/eBayISAPI.dll?SellSimilarItem&itemid=392097721318(note that all that is speculation based on observations lately - more data via your test(s) and other seller input is required to see if the theory holds)
