After reaching extreme levels of exasperation, I feel I have no choice but to reopen this discussion.
My iPhone is on 26. 6.1. This morning I was dictating a reply on WhatsApp about house decoration, and it consistently rendered the word ‘painter’ as ‘(Painter)’.
WHY??
You might have a contact card with Painter capitalized.
Happens to me all the time. “pain” > “Payne” etc. Everyone says the new Siri AI in OS 27 fixes dictation
I wrote a whole article about this. 
What a Payne in the Ashe.
Shirley you jest. (And yes, this has happened to me with Siri, but with “Surely you know …”)
It turns out that I do indeed have a contact called ‘Paul (Painter)’.
This is all just so dumb. Thanks for the article link, Adam.