Zoho CRM template editor deletes part of the code

Zoho CRM template editor deletes part of the code

Hi,
Since a few weeks I have a problem with template editor for Zoho CRM, for all the modules. While uploading a template with HTML code, the editor deletes constantly one part of the code, which is  <map name="image-map">, so the template doesn't work correctly.
When I reopen the template editor and put the code again, it gets deletes again as soon as I am trying to save it. Could you look into that, please?
Best regards,

Joanna