SubjectTerm and FromStringTerm not searching for cyrrilic literals in gmail

Hello
I'm writing a client to receive emails from different servers. While filtering messages from **gmail** accounts with _SubjectTerm_ or _FromStringTerm_ with cyrrilic literals there is no result. But for other servers, like _yandex.mail_ or _mail.ru_ filtering works just fine.

Start by reproducing the Gmail behavior with SubjectTerm and FromStringTerm using Cyrillic literals, then compare the results with Yandex Mail or mail.ru. The issue is done when searches using those terms return the expected Gmail messages; no source file or test is identified in the report.

Written by the indexing model from the issue text.