font of status bar is bold, also the keyboard font size is. how to fix this?

Solar2D iOS
#1

compare to build-in email app, when I am using corona made app, the font of status bar is bold, how to fix? see the attached screenshots? also the keyboard font is bold, not like build-in apps.

thanks!

#2

tested with the latest corona sdk(3007) and iphone( ios 10 ).

#3

tested with the latest corona sdk(3007) and iphone( ios 10 ).