That made me smile.
I guess that's the difference between "check while I
type" (i.e., not what others have typed) and upon sending.
I have never seen anything to change the behavior you're describing. If it really bothers you, you probably need to switch to some third-party application.
On a Mac since 1984.
Currently: 27" iMacs, Macbook Air, macOS 10.14.x,; iPhones, iPods and iPads galore!