Case sensitive search in Requester Name in cyrillic

Case sensitive search in Requester Name in cyrillic

SDP: 9028
DB: bundled Postgres

When creating New request and typing user name in

Requester Details -> Name
field i have following problem:
* latin characters working like expected: "Nata" and "nata" are the same and both shows "natalia" in hints
* cyrillic characters are case sensitive" "Ната" works fine and shows "Наталия" and "ната" shows nothing

How can i make cyrillic search case insensitive?
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