Incorrectly indexed pages

Hello! Our pages descriptions are displayed with what looks like wrong encoding in organic search results. like this:

This error seem to be across the board across different page types but yet completely random.

I checked Bing's webmaster tool and discovered pages in question are indexed incorrectly

The pages use standard UTF-8 charset so I am at loss what could be causing this issue.

Has anybody had the same issue and how did you solve it? What else should I check on my site? Thank you.