Endpoint/Configuration/Core/Startup/LoggerConfiguration.cs

@@ -95,7 +95,7 @@ public static class LoggerConfiguration
                     diagnosticContext.Set("RequestHost", httpContext.Request.Host.Value);
                     diagnosticContext.Set("RequestScheme", httpContext.Request.Scheme);
                     diagnosticContext.Set("UserAgent", httpContext.Request.Headers.UserAgent);
-                    diagnosticContext.Set("RemoteIPAddress", httpContext.Connection.RemoteIpAddress?.ToString());
+                    diagnosticContext.Set("RemoteIPAddress", httpContext.Connection.RemoteIpAddress?.ToString() ?? string.Empty);
                 };
         });
     }