Open Graph in custom domain

Hi! Long story short: I can force-refresh OG tags in mysite.webflow.com, but can’t force-refresh them in custom hosted domain mysite.com. Facebook got stuck with first-scraped results.

I’m using Facebook object debugger: Sharing Debugger - Meta for Developers (adding ?fbrefresh=X doesn’t work too). This is what I get for pressing any button for Название и логотип школы графики «KeyVisual». Everything’s updating in seconds:

This is what i get if I try to Fetch new information for http://maxalchemy.com/showoff/keyvisual/logo:

And this is what I get if I pick Show existing information (it shows info I’ve scraped 3 hours before, and it’s wrong):

I’d highly appreciate if someone helps, cause I have no idea what to do now.