After updating legenda, (still uses invalid core files for wp, which i have read you post that it is not much of an issue) I have experienced this issue with product category descriptions.
Notice: wp_editor() was called with an argument that is deprecated since version 3.9! TinyMCE editor IDs cannot have brackets. in /home/site/public_html/wp-includes/functions.php on line 3318
If I have a description typed in, and try to insert a link the page breaks. I cannot close the popup window for the page without refreshing. When trying to click X on the box my console displays
TypeError: wpLink.textarea is undefined
Im not sure if this is related to the template or not, as I was made aware of this error after we updated Legenda to 2.4. Any information you can provide will certainly help narrow this problem down.