Typing suggestions is BROKEN in some iOS 16 point release

Since some point release typing suggestions goes broken in iOS 16. Instead of requiring less typed letters to show my favorite word in typing suggestions, it require MORE typed letters with time!

I've reset keyboard dictionary in Settings. Start typing and my required word appears in Suggestions field after three typed letters. However, after about a week, it require typing FOUR letters to appear! Since one more week it require SIX typed letters to suggest my frequently used word!!

This is UNACCEPTABLE to reset keyboard dictionary every two weeks!