Searching commits doesn't work with Cyrillic

When looking at the commits screen in a project, there is a search box in the upper right, but terms in Cyrillic never match anything.

I'm attaching the following screenshots (the repo is private!):

1 - This works https://bitbucket.org/4bits-mirela/mirela/commits/all?search=olx

2 - This finds nothing, despite matching commits being visible in the list above https://bitbucket.org/4bits-mirela/mirela/commits/all?search=%D0%BB%D0%BE%D0%B3%D0%B2%D0%B0%D0%BD%D0%B5