diff --git a/QuickLook.Plugin/QuickLook.Plugin.TextViewer/TextViewerPanel.cs b/QuickLook.Plugin/QuickLook.Plugin.TextViewer/TextViewerPanel.cs
index 38b4514..317ba70 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.TextViewer/TextViewerPanel.cs
+++ b/QuickLook.Plugin/QuickLook.Plugin.TextViewer/TextViewerPanel.cs
@@ -24,6 +24,7 @@ using QuickLook.Common.Helpers;
 using QuickLook.Common.Plugin;
 using System;
 using System.IO;
+using System.Linq;
 using System.Reflection;
 using System.Text;
 using System.Threading.Tasks;
@@ -177,8 +178,8 @@ public class TextViewerPanel : TextEditor, IDisposable
             var bufferCopy = buffer.ToArray();
             buffer.Dispose();
 
-            var encoding = CharsetDetector.DetectFromBytes(bufferCopy).Detected?.Encoding ??
-                           Encoding.Default;
+            var result = CharsetDetector.DetectFromBytes(bufferCopy);
+            var encoding = result.DoubleDetectFromResult(bufferCopy); // Fix issues
 
             var doc = new TextDocument(encoding.GetString(bufferCopy));
             doc.SetOwnerThread(Dispatcher.Thread);
@@ -199,3 +200,57 @@ public class TextViewerPanel : TextEditor, IDisposable
         });
     }
 }
+
+file static class DetectionExtensions
+{
+    public static Encoding DoubleDetectFromResult(this DetectionResult result, byte[] buffer)
+    {
+        // Determine the highest confidence encoding, or fallback to ANSI
+        var encoding = result.Detected?.Encoding ?? Encoding.Default;
+
+        // When mixing encodings, one of the encodings may gain higher confidence
+        // In this case, we should return to encodings UTF8 / UTF32 / ANSI
+        // https://github.com/QL-Win/QuickLook/issues/769
+        if (encoding != Encoding.UTF8 && encoding != Encoding.UTF32 && encoding != Encoding.Default)
+        {
+            if (result.Details.Any(detail => detail.Encoding == Encoding.UTF8))
+            {
+                encoding = Encoding.UTF8;
+            }
+            else if (result.Details.Any(detail => detail.Encoding == Encoding.UTF32))
+            {
+                encoding = Encoding.UTF32;
+            }
+            else if (result.Details.Any(detail => detail.Encoding == Encoding.Default))
+            {
+                encoding = Encoding.Default;
+            }
+        }
+
+        // When the text is too short and lacks a BOM
+        // In this case, we should fallback to an encoding if it is not recognized as UTF8 / UTF32 / ANSI
+        // https://github.com/QL-Win/QuickLook/issues/471
+        // https://github.com/QL-Win/QuickLook/issues/600
+        // https://github.com/QL-Win/QuickLook/issues/954
+        if (buffer.Length <= 50)
+        {
+            if (encoding != Encoding.UTF8 && encoding != Encoding.UTF32 && encoding != Encoding.Default)
+            {
+                if (!Encoding.UTF8.GetString(buffer).Contains("\uFFFD"))
+                {
+                    encoding = Encoding.UTF8;
+                }
+                else if (!Encoding.UTF32.GetString(buffer).Contains("\uFFFD"))
+                {
+                    encoding = Encoding.UTF32;
+                }
+                else if (!Encoding.Default.GetString(buffer).Contains("\uFFFD"))
+                {
+                    encoding = Encoding.Default;
+                }
+            }
+        }
+
+        return encoding;
+    }
+}