To reproduce:
Open a large document and start scrolling fast.
The pages a blank when scrolling and are rendered after scrolling stops.
Hello,
A Fix will be available in LIB Version 2019.1.325 scheduled for March 25th.
New property AsyncRender (default value true) which enables or disables the async rendering of pages.
New property CachePaint (default value true) which enables or disables the cached painting of pages.
Regards,
Dimitar