R devel - Oct 2019 - R plot window repaint and close issue on CentOS7.2

Hi,

I have embedded R into Qt application (DyLoad R.dll and set bunch of
callbacks e.g  ReadConsole, WriteConsole etc). On CentOS7.2, the plot
command works fine, plots data nicely, but when i try to close it by
clicking on close tool button it doesn't closes. Also, when maximized, the
plot window becomes blank i.e. it doesn't repaint.

I am using R-3.6.0. Pls not that on Windows, it works just fine.

Appreciate any comment

Thanks

Sandy

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