I just checked out your app and everything works just fine.

Thanks, I'll go through your code, but I don't expect anything to come of it.

Also, it may or may not be relevant, but the other diff is that now I'm running it on Win11.

I'll see if i can divorce the app from the DB, or maybe include just the tables needed to repro.

I'm on 22.1.

I believe I brought it up from 2020.

I'm controlling all my styles through a style class.  Here's the method that does grid styles.

public void GridStyles(UltraGrid grid)
        {
            SetGlobals();
            ////////BEGIN Grid-level///////////
            //ColumnsCollection columns = grid.DisplayLayout.Bands[0].Columns;
            //foreach (UltraGridColumn c in columns)
            //{
            //    c.Nullable = Nullable.Nothing;
            //}
            
            grid.UseOsThemes = DefaultableBoolean.False;
            grid.UseAppStyling = false;
            grid.DisplayLayout.Appearance.FontData.SizeInPoints = 8;//gridFontSize;
            grid.DisplayLayout.Appearance.BackColor = colorBase;
            grid.Layouts.Grid.DisplayLayout.ColumnChooserEnabled = DefaultableBoolean.True;
            grid.DisplayLayout.AutoFitStyle = AutoFitStyle.None;
            ////////END Grid-level/////////////

            ////////BEGIN Rows///////////
            grid.DisplayLayout.Bands[0].Override.RowAppearance.BackColor = gridRowColor;
            grid.DisplayLayout.Bands[0].Override.RowAlternateAppearance.BackColor = gridRowAlternateColor;
            grid.DisplayLayout.Bands[0].Override.RowAlternateAppearance.ForeColor = fontColorBase;
            grid.DisplayLayout.Bands[0].Override.RowAppearance.ForeColor = fontColorBase;
            //grid.DisplayLayout.Bands[0].Override.RowSelectorAppearance.Image = gridColChooserImage;
            //grid.DisplayLayout.Bands[0].Override.AddRowAppearance.Image = gridAddRowImage;

            grid.DisplayLayout.RowSelectorImages.AddNewRowImage = Image.FromFile("./Images/MinionAddGridRow.ico");

            grid.DisplayLayout.RowSelectorImages.ActiveAndAddNewRowImage = Image.FromFile("./Images/EditRow.png");

            //grid.DisplayLayout.Appearance.o.Image = gridColChooserImage;
            ////////END Rows///////////
            //Look of AddRow when it's not active in the grid.
            //this.gridLocations.DisplayLayout.Override.TemplateAddRowCellAppearance.BackColor = Color.Yellow;
            //this.gridLocations.DisplayLayout.Override.TemplateAddRowCellAppearance.ForeColor = Color.LightYellow;

            //Look of AddRow when it's active in the grid.
            grid.DisplayLayout.Override.AddRowCellAppearance.BackColor = Color.LightYellow;
            grid.DisplayLayout.Override.AddRowCellAppearance.ForeColor = Color.Red;
            grid.DisplayLayout.GroupByBox.Appearance.BackColor = colorBase;
            ////////BEGIN Group By Box///////////
            
            //if ((int) grid.DisplayLayout.Grid.Rows.SummaryValues[0].Value == 1)
            //{
            //    grid.DisplayLayout.Grid.Rows.SummaryValues[0].Appearance.BackColor = Color.Blue;
            //}
            grid.DisplayLayout.Override.RowSizing = RowSizing.AutoFree;
            grid.DisplayLayout.GroupByBox.Appearance.BackGradientStyle = GradientStyle.None;
            ////////END Group By Box/////////////
            grid.DisplayLayout.Override.RowSelectorHeaderStyle = Infragistics.Win.UltraWinGrid.RowSelectorHeaderStyle.ColumnChooserButton;
            ////////BEGIN Header///////////
            grid.DisplayLayout.Override.HeaderAppearance.BackColor = gridHeaderColor;
            grid.DisplayLayout.Override.HeaderAppearance.ForeColor = fontColorBase;
            grid.DisplayLayout.Override.HeaderAppearance.BackGradientStyle = GradientStyle.None;
            grid.DisplayLayout.Override.ColumnAutoSizeMode = ColumnAutoSizeMode.AllRowsInBand;
            ////////END Header/////////////

            ////////BEGIN Fixed Header///////////
            grid.DisplayLayout.Override.FixedHeaderAppearance.BackColor = gridFixedHeaderColor;
            grid.DisplayLayout.Override.FixedHeaderAppearance.ForeColor = gridFixedHeaderFontColor;
            ////////END Fixed Header/////////////

            UltraGridLayout layout = grid.DisplayLayout;
            UltraGridBand band = layout.Bands[0];
            if (band.Columns.Exists("ServerName"))
            {
                UltraGridColumn column = band.Columns["ServerName"];
                column.Style = Infragistics.Win.UltraWinGrid.ColumnStyle.Button;
                grid.DisplayLayout.Override.CellButtonAppearance.ImageHAlign = HAlign.Center;
                grid.DisplayLayout.Override.ButtonStyle = UIElementButtonStyle.Borderless;
                grid.DisplayLayout.UseFixedHeaders = true;
                grid.DisplayLayout.Bands[0].Columns["ServerName"].Header.Fixed = true;
                grid.DisplayLayout.Override.FixedCellSeparatorColor = gridFixedCellSeparator;
                column.Header.Appearance.Image = Image.FromFile("./Images/SingleEyecon.png");
            }
            if (band.Columns.Exists("DriveName"))
            {
                UltraGridColumn column = band.Columns["DriveName"];
                column.Style = Infragistics.Win.UltraWinGrid.ColumnStyle.Button;
                grid.DisplayLayout.Override.CellButtonAppearance.ImageHAlign = HAlign.Center;
                grid.DisplayLayout.Override.ButtonStyle = UIElementButtonStyle.Borderless;
                grid.DisplayLayout.UseFixedHeaders = true;
                grid.DisplayLayout.Bands[0].Columns["DriveName"].Header.Fixed = true;
                grid.DisplayLayout.Override.FixedCellSeparatorColor = gridFixedCellSeparator;
                column.Header.Appearance.Image = Image.FromFile("./Images/SingleEyecon.png");
            }
            //grid.DisplayLayout.PerformAutoResizeColumns(true, PerformAutoSizeType.AllRowsInBand,
            //        AutoResizeColumnWidthOptions.All);
            ////////BEGIN Filter Row///////////
            grid.DisplayLayout.Bands[0].Override.RowFilterMode = RowFilterMode.AllRowsInBand;
            grid.DisplayLayout.Bands[0].Override.FilterRowAppearance.Image =
                    Image.FromFile("./Images/Find.png");
                grid.DisplayLayout.Bands[0].Override.FilterRowAppearance.BackColor = gridFilterRowColor;
            grid.DisplayLayout.Bands[0].Override.RowSelectors = DefaultableBoolean.True;
            //grid.DisplayLayout.Bands[0].Override.RowSelectorAppearance
            ////////END Filter Row/////////////

            ////////BEGIN Error Row///////////
            grid.DisplayLayout.Bands[0].Override.DataErrorRowAppearance.BackGradientStyle =
                GradientStyle.GlassBottom20;
            grid.DisplayLayout.Bands[0].Override.DataErrorRowAppearance.BackColor = gridDataErrorGradient1;
            grid.DisplayLayout.Bands[0].Override.DataErrorRowAppearance.BackColor2 = gridDataErrorGradient2;
            grid.DisplayLayout.Bands[0].Override.DataErrorRowAppearance.Image = gridDataErrorImage;
            ////////END Error Row/////////////
        }

I'm not setting row size anywhere. Separating the grid from the app to package up for you would be quite difficult as the whole thing is highly dependent on the DB.