Posts and pages redirected to random comments feed

Hello!

I’m having a strange bug on https://drumliber.ro/ when i go to read pages or posts: sometimes it shows a random comments feed instead of the page/article.

I don’t see a pattern as sometimes it shows the page, sometimes it’s showing the random rss feed of another page/article.

Changed the theme, disabled all plugins, it’s showing the random feed.

I found there were 2 other guys having a similar problem, one on WP and one WP MU, but there is no solution or reply to this strange and rare bug.

Can you please help me on this?