Good day and welcome!
It seems the inner workings of the AI filter is kept under wraps so as to not abuse it, that also comes with the frustration of not having an answer on how to reliably escape it.
That said, you’ve mentioned memorial benches, making sure you’ve read what has been mentioned in Seating Benches
It may help posting examples here to see if there can be improvements in your submission. Or as something to show the team about the limitations of the filter as it is today.