Dictation errors

My dictation was working perfectly until about 2 or 3 iOS upgrades ago. I’m having problems with dictation not capitalizing the first word of a sentence or paragraph, and it consistently puts a period behind my surname. The quality of the spelling is considerably worse as well. If there was an error, I used to be able to highlight the word and replace it with a capitalized version or a corrected spelling version and that no longer happens. The choices for the replacement word, especially with capitalization do not appear.

when I say I, it types are. When I say has, it types Hass. (See there is no capitalization at the beginning of this paragraph). sometimes after I correct the capitalization error, it will revert to the incorrect uncapitalized word. see there is no capitalization at the beginning of this nor the last sentence either.

I turned off Siri and turned it on again. I think it is a bit better but it’s not consistently better.

I pretty much dictate everything whenever possible, and I love it. It has become quite cumbersome because of all the corrections I now have to do.

any ideas? Is there a Dictionary that my dictation access is that I need to reinstall?? (The beginning of this paragraph was capitalized and then it took away the capitalization of the word any).

Thank you for your responses.