debug: only show exception widget when exception frame is focused

fixes #29097

src/vs/workbench/parts/debug/electron-browser/debugEditorContribution.ts

@@ -365,7 +365,7 @@ export class DebugEditorContribution implements IDebugEditorContribution {
 
 		// First call stack frame that is available is the frame where exception has been thrown
 		const exceptionSf = first(callStack, sf => sf.source && sf.source.available, undefined);
-		if (!exceptionSf) {
+		if (!exceptionSf || exceptionSf !== focusedSf) {
 			this.closeExceptionWidget();
 			return;
 		}