Pages inappropriate 'spell checking'

Using Macbook Air, OS Monterey. Pages red-underlines words that are properly spelled, properly used, and properly formatted. I know I can turn off spell checking, but I don't want to as I do sometimes make mistakes. I also know the red underlining won't appear in the actual document, if I have to print or send it somewhere. And I know I can add to the 'ignore word' list. But it shouldn't be necessary to add words like 'of', 'for', 'there', &c. Seems like there's a bug in Pages spell check. Is this just something we have to live with?