I have experienced similar despite being on a much older iOS over 2023.
I use voice-to-text rather frequently and have started noticing words like ‘paragraph’ and ‘said’ as well as others being inserted at the start of sentences. Although, more recently it’s just become more inaccurate, inserting words with no phonetic similarity to what was actually said, if anything was even said there in the first place.
This is rather bizarre considering how close to perfect it used to be. There were always a couple of errors but this was often down to accent or bizarre words. It was rare enough that myself or people reading it would be able to understand what was meant to be written. Now, after long or text paragraphs, it’s hard to go back to such words and figure out what was meant to be there in the first place especially when some of these words are inserted as surplus.
Aside from sometimes replacing the first word with another, one rare occurrence occurring on my Mac is certain phrases will be instantly typed out incorrectly as something completely different. I could say, “what is the location of (XYZ)” and before I even finish, it immediately types out, “Auckland store on Queen street.” a sentence bearing no relation to what was said. These are fake examples.
Funnily enough, it recognises immediately that this is not what was said. Paragraph only to quickly delete these words letter-by-letter and type out what was actually said.
Such phrases are usually one of three which are typed out in varying degrees of length. I don’t even understand where this information is being stored for it to be recalled in such a bizarre manner.
like yourself, I too would love to gain some insight into why these things are happening.