HTML text at beginning and end of standard details text can't be deleted

[aussiegc]

I have been listing new items and when I go to revise them the text for the details box keeps inserting HTML language at the beginning and end.  It says 'it looks like there is a problem.  Please fix' for something like that.  When I delete the HTML language it won't let me finish revising and it just goes back to the same problem!!  What is going on eBay????  I have never had this problem before.

[twyngwyn]

see here:

https://tamebay.com/2017/08/edit-listings-meet-ebay-secure-https-content-requirements.html

[aussiegc]

I cannot see the solution to my problem with that link.  Perhaps you may be able to explain to me what I am doing incorrectly?