Can't link GroupFocus to Reference Button


I have Repeating Group and in it’s cell I have Group with two buttons in it.
When I create GroupFocus and try to relate it to a Button within this Group it is not possible. The Buttons do not appear in options for Reference Elements for this new GroupFocus.
If I drag and drop button out of the Repeating Group, then the button can be related to GroupFocus as reference element. But when I pull back the button into the Group into Repeating Group Cell, the button doesn’t work on that GroupFocus.

Please for advice how to create GroupFocus and relate to a reference element that is in Repeating Group.

Thank you

Put the button inside a reusable element, and include the GroupFocus inside that RE.

Then add the RE to the RG.

thanks a lot @adamhholmes