Fix issue with getting log for a simple task execution

src/Microsoft.Build.Utilities.ProjectCreation.UnitTests/BuildEngineTests.cs

@@ -111,6 +111,23 @@ public void Warnings(string expectedMessage, string expectedCode)
             args.Code.ShouldBe(expectedCode);
         }
 
+        [Fact]
+        public void WithTask()
+        {
+            BuildEngine buildEngine = BuildEngine.Create();
+
+            var task = new TestTask
+            {
+                BuildEngine = buildEngine,
+            };
+
+            bool result = task.Execute();
+
+            result.ShouldBeTrue();
+
+            buildEngine.GetConsoleLog().ShouldContain("Test Message", customMessage: buildEngine.GetConsoleLog());
+        }
+
         private BuildEngine GetBuildEngineWithEvents(Action<IBuildEngine> action)
         {
             BuildEngine buildEngine = BuildEngine.Create();
@@ -119,5 +136,15 @@ private BuildEngine GetBuildEngineWithEvents(Action<IBuildEngine> action)
 
             return buildEngine;
         }
+
+        private class TestTask : Task
+        {
+            public override bool Execute()
+            {
+                Log.LogMessageFromText("Test Message", MessageImportance.High);
+
+                return true;
+            }
+        }
     }
-}
+}

src/Microsoft.Build.Utilities.ProjectCreation/ConsoleLoggerStringBuilder.cs

@@ -147,6 +147,11 @@ public void ReplayEvents(IReadOnlyCollection<BuildEventArgs> events)
             {
                 foreach (BuildEventArgs buildEventArgs in events)
                 {
+                    if (buildEventArgs.BuildEventContext is null)
+                    {
+                        buildEventArgs.BuildEventContext = BuildEventContext.Invalid;
+                    }
+
                     AnyEventRaised?.Invoke(this, buildEventArgs);
 
                     switch (buildEventArgs)