What about my school paper is Writing Tools not designed to work with?

I have been trying to get basic grammar and sentence structure corrected by Writing Tools for my paper in Pages and it kept giving me back this message you are all probably aware of "Writing Tools aren't designed to work with his type of content." So instead of highlighting the whole page, I went paragraph by paragraph, and got to the "problem" paragraph and Im dumbfounded as to what could be the "red flag words" or the content that is causing the issue. Here is the paragraph, its not explicit, it does talk about a romantic relationship I had, I at first called it an "affair" but changed it to "romance" and it still was not acceptable. My MacOS is up to date, I'm not sure what else to do...I like to use this tool to check my work for flow and readability, but this error is irking me and seems like its only recently come on scene with such force..I finally switched over from OtHeR Ai PlAtFoRmS but Im about to go back...🤦🏻‍♀️ TIA for any help bringing clarity about this to me!

"When she looked at me, I felt like she was seeing into the depths of my safest hiding places. Truly seeing me as I’ve not been seen before, or since. I felt like I had no option of holding the walls up against her, and after the process we had gone through, I didn’t have a desire to either. It created a bond. We felt so much from that interaction that we ended up spending the night together and continued on to have a brief love affair, of which Anaïs Nin would be proud. (Minus the lying and cheating as we were not in previous committed relationships and were free to enjoy each other for the time we wanted to.) The beauty of the relationship was that it ended unlike any other I had had before. We didn’t go through the Differentiating, Circumscribing, Stagnating, Avoiding, or Terminating stages. We kind of just drifted, no intent to leave, no hard goodbyes, no resentment, fear, or neediness, no push and pull for unrequited attention or affection. It just was and then was not, and all was good and enjoyable. "