G3: Cap components (bottom of the shape)

When I’m adding a cap components to the bottom of the shape, here is what’s happening

If I simply copy this component from another glyph it works just fine.
Top of the shape (b letter for example) - works fine, I can add caps no problem.
If I copy top cap component to the bottom of the shape - works fine, I can then simply select another cap component from the list and it will look the way it should look.
But, no matter what I do (change alignment, scale, path direction), adding a new cap component to selected two points at the bottom of the shape doesn’t work.

Can you send me that file?