diff --git a/Source/Engine/Render2D/FontReference.cs b/Source/Engine/Render2D/FontReference.cs
index 449134b94..22b0e02c8 100644
--- a/Source/Engine/Render2D/FontReference.cs
+++ b/Source/Engine/Render2D/FontReference.cs
@@ -18,6 +18,16 @@ namespace FlaxEngine
         [NoSerialize]
         private Font _cachedFont;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FontReference"/> struct.
+        /// </summary>
+        public FontReference()
+        {
+            _font = null;
+            _size = 30;
+            _cachedFont = null;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="FontReference"/> struct.
         /// </summary>
@@ -61,9 +71,7 @@ namespace FlaxEngine
                 if (_font != value)
                 {
                     _font = value;
-
-                    if (_cachedFont)
-                        _cachedFont = null;
+                    _cachedFont = null;
                 }
             }
         }
@@ -80,9 +88,7 @@ namespace FlaxEngine
                 if (_size != value)
                 {
                     _size = value;
-
-                    if (_cachedFont)
-                        _cachedFont = null;
+                    _cachedFont = null;
                 }
             }
         }
@@ -104,9 +110,7 @@ namespace FlaxEngine
         /// Determines whether the specified <see cref="FontReference" /> is equal to this instance.
         /// </summary>
         /// <param name="other">The <see cref="FontReference" /> to compare with this instance.</param>
-        /// <returns>
-        /// <c>true</c> if the specified <see cref="FontReference" /> is equal to this instance; otherwise, <c>false</c>.
-        /// </returns>
+        /// <returns><c>true</c> if the specified <see cref="FontReference" /> is equal to this instance; otherwise, <c>false</c>.</returns>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public bool Equals(FontReference other)
         {
diff --git a/Source/Engine/UI/GUI/Common/Label.cs b/Source/Engine/UI/GUI/Common/Label.cs
index 1b06e1867..ba5763f31 100644
--- a/Source/Engine/UI/GUI/Common/Label.cs
+++ b/Source/Engine/UI/GUI/Common/Label.cs
@@ -185,8 +185,8 @@ namespace FlaxEngine.GUI
             AutoFocus = false;
             var style = Style.Current;
             Font = new FontReference(style.FontMedium);
-            TextColor = Style.Current.Foreground;
-            TextColorHighlighted = Style.Current.Foreground;
+            TextColor = style.Foreground;
+            TextColorHighlighted = style.Foreground;
         }
 
         /// <inheritdoc />
@@ -196,8 +196,8 @@ namespace FlaxEngine.GUI
             AutoFocus = false;
             var style = Style.Current;
             Font = new FontReference(style.FontMedium);
-            TextColor = Style.Current.Foreground;
-            TextColorHighlighted = Style.Current.Foreground;
+            TextColor = style.Foreground;
+            TextColorHighlighted = style.Foreground;
         }
 
         /// <inheritdoc />
diff --git a/Source/Engine/UI/GUI/Common/RichTextBox.cs b/Source/Engine/UI/GUI/Common/RichTextBox.cs
index 837ec0ec7..8b2cc5cb3 100644
--- a/Source/Engine/UI/GUI/Common/RichTextBox.cs
+++ b/Source/Engine/UI/GUI/Common/RichTextBox.cs
@@ -9,12 +9,7 @@ namespace FlaxEngine.GUI
     /// </summary>
     public class RichTextBox : RichTextBoxBase
     {
-        private TextBlockStyle _textStyle = new TextBlockStyle
-        {
-            Font = new FontReference(Style.Current.FontMedium),
-            Color = Style.Current.Foreground,
-            BackgroundSelectedBrush = new SolidColorBrush(Style.Current.BackgroundSelected),
-        };
+        private TextBlockStyle _textStyle;
 
         /// <summary>
         /// The text style applied to the whole text.
@@ -30,6 +25,17 @@ namespace FlaxEngine.GUI
             }
         }
 
+        public RichTextBox()
+        {
+            var style = Style.Current;
+            _textStyle = new TextBlockStyle
+            {
+                Font = new FontReference(style.FontMedium),
+                Color = style.Foreground,
+                BackgroundSelectedBrush = new SolidColorBrush(style.BackgroundSelected),
+            };
+        }
+
         /// <inheritdoc />
         protected override void OnParseTextBlocks()
         {
diff --git a/Source/Engine/UI/GUI/Style.cs b/Source/Engine/UI/GUI/Style.cs
index a945d1602..5b77e8682 100644
--- a/Source/Engine/UI/GUI/Style.cs
+++ b/Source/Engine/UI/GUI/Style.cs
@@ -22,7 +22,7 @@ namespace FlaxEngine.GUI
         [EditorOrder(10)]
         public Font FontTitle
         {
-            get => _fontTitle.GetFont();
+            get => _fontTitle?.GetFont();
             set => _fontTitle = new FontReference(value);
         }
 
@@ -36,7 +36,7 @@ namespace FlaxEngine.GUI
         [EditorOrder(20)]
         public Font FontLarge
         {
-            get => _fontLarge.GetFont();
+            get => _fontLarge?.GetFont();
             set => _fontLarge = new FontReference(value);
         }
 
@@ -50,7 +50,7 @@ namespace FlaxEngine.GUI
         [EditorOrder(30)]
         public Font FontMedium
         {
-            get => _fontMedium.GetFont();
+            get => _fontMedium?.GetFont();
             set => _fontMedium = new FontReference(value);
         }
 
@@ -64,7 +64,7 @@ namespace FlaxEngine.GUI
         [EditorOrder(40)]
         public Font FontSmall
         {
-            get => _fontSmall.GetFont();
+            get => _fontSmall?.GetFont();
             set => _fontSmall = new FontReference(value);
         }