Zip and Email not accepting non-ASCII characters

Hi folks (and please excuse the broken English)!

When I use Swedish characters like ÅÄÖ and åäö in the Subject field, I get the error message in the enclosed screenshot. Please note that even the error message is messed up. Maybe it would be better using UTF-8?

It's also strange that a part of the error message is in English and the other part is in Swedish...

Is there anything I can do to solve this, except for skipping Swedish characters?

Using non-ASCII characters in the message field seems to work just fine.

Skärmbild 2024-05-29 094354