Toc – Table content Plus doubles subtitle h2

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I have a wordpress in Genesis Focus Pro theme.
If you activate the TOC plugin, the subtitle h2 is duplicated.
The page shows the sub-page h2 with a few lines of text and then repeats the h2 again with the rest of the text.
I’ve searched for another GeneratePress theme and it works.
What is the reason for you to duplicate the subtitle h2?
Thank you