FMX NavBar Design Error


i got this problem when i drop FMX NavBar on my application there was design error
i try to add section, and link the section to a control then compile it, it came with error saying that FMXNavBarPanelSec3Name2 already exist, and then i see there was more than that name inside the design file, after some experiment the problem was solved, i can compile and run the program

but  here comes the problem when i tried to adjust the size of each section there was no update on the design view and the result program was not updated either
and now i must manually calculate and assign position to each section header, linked control component of that section


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