HomePod mispronounces words it has correctly transcribed

Weirdly, my HomePod mispronounces words that it has correctly transcribed. Is there a way to fix or reset this?

Example:

"Remind me to clean my eavestrough" will be correctly added to my Reminders, but read back to me as "clean my evesstrow". "Remind me to post a Tuesday Q&A signup" will be added correctly to my reminders, but read back as "post a Tuesday Q&A sigg-nup." It correctly transcribes the word "vacuum", but reads it back as "vah-cuum". These are consistent mispronunciations.