BUG: Expand group and alternate coloring wrong

Hi;

Using v17.3.0 I set up the report control to use alternate coloring and grouping.
In one of my test cases I added only one record per group and then I recognized that the alternate color is used all the time when the first group row is expanded otherwise the default background color is correctly used:

Before - not expanding the first group row:



After - the first group row is now expanded:



You see, the same records get different colors depending on the expand state of the first group row. CRAZY!
When I finally collapse the first group record I have the same appearance as in the first screenshot - the color changes to the default coloring.
I believe the algorithm for switching colors is not distinguishing between group rows and regular rows! See void CXTPReportPaintManager::FillRow(CDC* pDC, CXTPReportRow* pRow, CRect rcRow) function!

Hope to get this fixed soon.