-protected virtual internal bool EnableProcessRedirection =>
+private static readonly bool _seDebugEnabled =
     Environment.GetEnvironmentVariable("SE_DEBUG") is not null;
+
+protected virtual internal bool EnableProcessRedirection => _seDebugEnabled;
 ...
 protected virtual void OnDriverProcessDataReceived(object sender, DataReceivedEventArgs args)
 {
-    if (Environment.GetEnvironmentVariable("SE_DEBUG") is not null && !string.IsNullOrEmpty(args.Data))
+    if (_seDebugEnabled && !string.IsNullOrEmpty(args.Data))
     {
-        Console.Error.WriteLine(args.Data);
+        try
+        {
+            Console.Error.WriteLine(args.Data);
+        }
+        catch (IOException)
+        {
+            // Ignore: stderr may be unavailable/closed in some hosts.
+        }
+        catch (ObjectDisposedException)
+        {
+            // Ignore: stderr writer was disposed by the host.
+        }
     }
 }

+private static bool _seDebugGeckoWarned;
+...
 if (Environment.GetEnvironmentVariable("SE_DEBUG") is not null)
 {
-    if (this.SuppressInitialDiagnosticInformation || this.LogLevel != FirefoxDriverLogLevel.Default)
+    if (!_seDebugGeckoWarned && (this.SuppressInitialDiagnosticInformation || this.LogLevel != FirefoxDriverLogLevel.Default))
     {
+        _seDebugGeckoWarned = true;
         Console.Error.WriteLine("WARNING: Environment Variable `SE_DEBUG` is set; forcing GeckoDriver log level to DEBUG and overriding configured log level.");
     }
     argsBuilder.Append(" --log debug");
 }

+private static bool _seDebugIeWarned;
+...
 if (Environment.GetEnvironmentVariable("SE_DEBUG") is not null)
 {
-    if (this.SuppressInitialDiagnosticInformation || this.LoggingLevel != InternetExplorerDriverLogLevel.Fatal)
+    if (!_seDebugIeWarned && (this.SuppressInitialDiagnosticInformation || this.LoggingLevel != InternetExplorerDriverLogLevel.Fatal))
     {
+        _seDebugIeWarned = true;
         Console.Error.WriteLine("WARNING: Environment Variable `SE_DEBUG` is set; forcing IEDriver log level to DEBUG and overriding configured log level.");
     }
     argsBuilder.Append(" -log-level=DEBUG");
 }

-private static bool _seDebugWarned;
+private static int _seDebugWarned;
 private readonly AsyncLocal<ILogContext?> _currentAmbientLogContext = new();
 
 public LogContextManager()
 {
     var defaultLogHandler = new TextWriterHandler(Console.Error);
 
+    var seDebug = Environment.GetEnvironmentVariable("SE_DEBUG") is not null;
+
     // Enable debug logging if SE_DEBUG environment variable is set
-    if (Environment.GetEnvironmentVariable("SE_DEBUG") is not null && !_seDebugWarned)
+    if (seDebug && Interlocked.Exchange(ref _seDebugWarned, 1) == 0)
     {
-        _seDebugWarned = true;
         Console.Error.WriteLine("WARNING: Environment Variable `SE_DEBUG` is set; Selenium is forcing verbose logging which may override user-specified settings.");
     }
-    var level = Environment.GetEnvironmentVariable("SE_DEBUG") is not null
+
+    var level = seDebug
         ? LogEventLevel.Debug
         : LogEventLevel.Warn;
 
     GlobalContext = new LogContext(level, null, null, [defaultLogHandler]);
 }