Cannot dictate an email using the Yahoo icon

I used to be able to dictate on all my emails using Siri with my yahoo icon, but ever since the update it cuts me off after two words. I can still dictate if I use the Apple mail icon for yahoo, but I don’t like to use it because my email comes in much slower than if I use my yahoo icon direct. Apple please fix this bug so that I can dictate once again using my yahoo icon on my emails. I have a 10S max. Thank you