Should or shouldn't rank, that's one thing. But are you in the SERP at all?

If yes - it's not an issue with indexing - your site is already indexed and it's a matter of ranking.

No that won't do. So the page in question has around 25-35k visitors each day with good authority. I had very specific keywords in this language and it was ranking just fine. But 2 days ago it lost index and when I submitted reindexing, it indexed without content. This is not a new page that's not being indexed, but already existing one with very good rankings.

Hello,

I have a problem of page indexing without content. I have website in 3 different languages and 2 of the pages are indexing just fine, but one language page (the most important one) is indexing without content. When searching using site: page comes up, but when searching unique keywords for which I should rank 100% nothing comes up.