Controls from components that are grouped disappear from result?

Hello, I have seen that if you have some components that contain already some controls components that are shown in the filter controls aand appear in the filter settings, when you group those components including inside the group all the control components, then they disappear from the filter controls and are missing in the filter settings.

For example take the great and wonderful CUT IT OUT !!! by Carl

GROUPING WITH CONTROL COMPONENTS INSIDE

1 - Open it in FF 4.03 with the hotfix
2 - then go to filter editor and group all the components
3 - then you get the group with 5 empty inputs and the result component outside
4 - but when going to the result component, all the previous controls have gone and are not available anymore.

I do not know if this is a bug or is it that you can´t group the controls of the components and they should be left out, as I have tried to group all the components except image input and result WITHOUT including the control components and it works right

GROUPING LEAVING OUTSIDE CONTROL COMPONENTS

1 - Open it in FF 4.03 with the hotfix
2 - then go to filter editor and group all the components BUT leave out any control components
3 - then you get the group with 5 inputs and all the corresponding controls attached to them
4 - when going to the result component, all the previous controls are still available.

If this is not a bug, at least I could suggest that a warning message could be shown telling that if you are including control components, they must be left out of the group so they are attached to the corresponding inputs after grouping, or that they will be deleted from the filter controls settings if you continue with the group, although kept inside the group.