I’m afraid at the moment there is nothing we can do about that. The plugin tries to calculate overflowing elements, but in most cases these are simply undetectable, so there is no offset.
The good news is, that the next release is almost ready, it will be out within 48 hours – and there we already added an option to set a +/- offset to these scrolling features. Then adding a positive value will scroll the window further down.
Can you please try changing this option to article: https://i.imgur.com/HvIlzj4.png
I believe the plugin detects another instance of the keyword within the document, which is within the menu somewhere and the calculation does not work correctly. That should very likely resolve the issue. This option will try to restrict ti to the actual article only.