Why is Google+ post's preview not recognizing UTF-8 - utf-8

When I try to share an article page on Google+ by putting its URL into the post, a preview is displayed with article's title, description and image. The problem is that the showed text is not UTF-8 and does not mean anything - Here is an example of what the post preview displays as an article's decription:
zveřejnà výsledky vyšetřovánà aféry
Try it for yourself - visit this page and try to share it on Google+: https://roklen24.cz/a/pzbmw/kdo-opravdu-stoji-za-burzovnimi-krachy-vinte-pocitace
Facebook sharing works fine, only Google+ is having this issue. It is not just one or two characters problem, each character with punctuation is behaving like that - it's mostly replaced by a character A with different punctuiation - here is an example:
ORIGINAL string: zveřejněné výsledky vyšetřování aféry
DISPLAYED string: zveřejnà výsledky vyšetřovánà aféry
Could You tell what might be causing this problem? Thanks

I think this issue was a bug on the Google side because it used to be working before.
I got the same problem as you said too but it seems to be fixed just few minutes ago.
Now??
10Hr before

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