Another workaround may be to use the Sony Reader for PC. This is where I download all my epubs - irrespective of where I get them from.
https://ebookstore.sony.com/download/
After they download into that I then import into Calibre where I clean them.
I don't use ADE or Kobo Desktop at all - I don't need to because all the Epubs go straight into Sony Reader as my default.