Sorry to hear about the struggle! I'd like to investigate to see what could be the issue here. Can you please email email@example.com and share the email associated with your Litmus account, plus a link to the test where you're seeing this weirdness with the characters? We are happy to help!
Thanks for checking in! We are still working to fix this, but have updated our status page here: https://status.litmus.com/. You can stay up to date by subscribing or checking that page. Hope this helps! If you have any other questions, please email firstname.lastname@example.org
We're looking into this as a Preview issue! Please email email@example.com and we're happy to take a look and confirm, but we are investigating right now.