Thus, I picked a similar page that content editors were using for textual content. At first I copied and pasted into the RTE but I could not press "accept" or even "reject", so I truncated said document and found that I reached threshold.
Furthermore, I also tried to type the content into the RTE, this time I was able to get more content to load, but I hit the threshold again.
I did some digging in the settings, not config files, to see if there is some setting on RTE, but I could not find anything.
Did anyone have a similar experience?