Fix Issue 3825

src/Avalonia.Visuals/Media/GlyphRun.cs

@@ -555,7 +555,7 @@ namespace Avalonia.Media
                 }
             }
 
-            return new Rect(0, 0, width, height);
+            return new Rect(0, GlyphTypeface.Ascent * Scale, width, height);
         }
 
         private void Set<T>(ref T field, T value)
@@ -595,8 +595,6 @@ namespace Avalonia.Media
             _glyphRunImpl = platformRenderInterface.CreateGlyphRun(this, out var width);
 
             var height = (GlyphTypeface.Descent - GlyphTypeface.Ascent + GlyphTypeface.LineGap) * Scale;
-
-            _bounds = new Rect(0, 0, width, height);
         }
 
         void IDisposable.Dispose()

src/Avalonia.Visuals/Rendering/SceneGraph/GlyphRunNode.cs

@@ -25,7 +25,7 @@ namespace Avalonia.Rendering.SceneGraph
             GlyphRun glyphRun,
             Point baselineOrigin,
             IDictionary<IVisual, Scene> childScenes = null)
-            : base(glyphRun.Bounds, transform)
+            : base(glyphRun.Bounds.Translate(baselineOrigin), transform)
         {
             Transform = transform;
             Foreground = foreground?.ToImmutable();