From 87639cab8ee433dcc27f6f7f408871f5a0cab802 Mon Sep 17 00:00:00 2001
From: FoggyFinder <FoggyFinder@yandex.ua>
Date: Sat, 26 Jun 2021 18:59:08 +0300
Subject: [PATCH] adjust checking

---
 src/Avalonia.Controls.DataGrid/DataGridRows.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Avalonia.Controls.DataGrid/DataGridRows.cs b/src/Avalonia.Controls.DataGrid/DataGridRows.cs
index a69b8eafe1..4bfbd7d818 100644
--- a/src/Avalonia.Controls.DataGrid/DataGridRows.cs
+++ b/src/Avalonia.Controls.DataGrid/DataGridRows.cs
@@ -425,7 +425,7 @@ namespace Avalonia.Controls
                 UpdateDisplayedRows(DisplayData.FirstScrollingSlot, CellsHeight);
             }
 
-            if (DisplayData.FirstScrollingSlot < slot && DisplayData.LastScrollingSlot > slot)
+            if (DisplayData.FirstScrollingSlot < slot && (DisplayData.LastScrollingSlot > slot || DisplayData.LastScrollingSlot == -1))
             {
                 // The row is already displayed in its entirety
                 return true;