How to Fix OneNote Typing is Slow and Doesn't Appear until a Few Seconds later?

Question:

The OneNote's typing speed suddenly slowed down. Some words appear only a few seconds after typing, and the words will also appear as if they were intercepted.
Everything else works fine, it's really just typing that slows! And only on OneNote.
 
Doing so notes is slower and annoying, how can I fix this?
 

Answer:

In the OneNote options window, just uncheck the "Check grammar with spelling".

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