Move Control in Group (R)

[Laulo-84]

ISN Studio 1.16
Hello,
I can't move a control (checkbox) in a Group.

I have my Group with existing controls, I created a new checkbox control, it appears in the Group but is not clickable.
If I move it out of the Group, it works.
Thanks for your help.

*************** EDIT *****************
I Have two superimposed controls.