This is occurring because of Microsoft's use of ANSI & wide-set characters in their codepages, and not utf-8 like the rest of the world.  As our entire codebase relies on unicode, things get particularly wonky on Windows, at times.  If you research, Monero, and every other cryptonote coin also experienced this issue and others.... again, only on Windows.  Linux Wallets and Mac wallets have never had errors like this.  If you know a Windows developer, kindly, refer him or her our way