@magicmark is there already a fix for this problem?
I get also the problem when I want to change the name of a div with a rich-text-element today.
Please can you look to my printscreen video
this issue about the white line problem of an IMGUR.com gif animation I discussed in this topic:
Problem WHITE LINE under the IMGUR.com gif-animation into rich-text-block! + solution no mousehover over gif anymore