Missing blank pages when language is not slovak in the Sci template

Created by: krejciadam

Hi! I found what I think is a bug in the template for sci.muni.

When I change the language from slovak by:

\usepackage[main=english, english, czech, slovak, german, russian]{babel} or \usepackage[main=czech, english, czech, slovak, german, russian]{babel}

the blank pages that should be after the title page, bibliographic entry etc. to ensure correct twoside layout disappear. It only works correctly for

\usepackage[main=slovak, english, czech, slovak, german, russian]{babel}

I'm using the current Overleaf version.

Thanks! Adam