Hello Boki,
There's a bug in the nextgrid when scrolling content horizontally.
It's very easy to reproduce
Create a nextgrid component.
Add 4 columns, each with a width of 200
Create a reportgridview
set selectfullrow to true
add few lines in the grid in formcreate
run it
scroll to the right then come back by clicking on left scroll button. At each click you will get the left side of the scroll rectangle not properly refreshed.
Regards,
Alex