Yeah, so after some testing, for me the issue seems to be with longer text with links. Very long texts with NO links seem to be giving NO issue. And if i add a few links to a small text post, there is also NO issue, but it is either when the post (which has links) gets long enough OR some issue with the links themselves.
I tested one post where I pasted my bibliography (it had many links), but the entire post is 513 words in length. I started removing some text (and links) and when I was around 250 words, the post started updating without an error. But these are not exact numbers as when I tried before, it started working before I reached the 250 word mark and this time it did not.
Anyways hope this helped! and hope you guys can resolve it soon. I am unsure if I am the only one facing the issue.