TableLayoutPanel in an Inherited UserControl

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I have a base user control that contains a TableLayoutPanel with control
inside of the panel. This form is inherited on multiple other forms, but on
the inherited forms, when you try to change any of the controls within the
panel, they are locked. I tried to change all of the Modifiers properties
on the controls and the panel to be public, but the controls still are
locked. Is this a bug, or is there something else that I need to set to be
able to modify the control on an inherited form?

Thanks,
Jeff Papp