To avoid repetitive ideas and sentences, I always turn off H3 now because the way the AI writes is like this:

H2 headline

Some introductory content and include expanded information that can be broken down into several H3 headlines.

H3 headline #1: something already explained in the H2 headline

H3 headline #2: something already explained in the H2 headline

And so on and so on.

So, please make the AI learn that whatever is being informed or written in the H2 section MUST NOT be repeated again in the subsequent H3 sub-headlines.