I am having an issue with Fullscreen and FMX.

I am having an issue with Fullscreen and FMX... My app is intended to run in full screen, it has more 2 forms besides the main form. I set FullScreen to true on the main form, when I open any other form the it keeps on full, nice, but when I return to the main form it loses the fullscreen, showing the status bar, now I tried to apply Fullscreen to all the other forms, no result.

The problem is with the main form only, when I return to it, reading the value of Fullscreen it shows as TRUE, but the screen won't reflect that state.