Diacritic ligatures

I’m wondering why auto alignment doesn’t work for diacritic ligatures?
For example: I’ve R_E ligature. When creating R_Eacute, acutecomb is not aligning to where it should be according to the top anchor position and it is movable.
Is it supposed to be this way?

Do you have top_1 and top_2 anchors in the base R_E?

Yes I do