reset lang id key

src/vs/workbench/common/resources.ts

@@ -54,6 +54,7 @@ export class ResourceContextKey implements IContextKey<URI> {
 		this._schemeKey.reset();
 		this._langIdKey.reset();
 		this._resourceKey.reset();
+		this._langIdKey.reset();
 		this._extensionKey.reset();
 	}
 
@@ -172,4 +173,4 @@ export class ResourceGlobMatcher {
 	public dispose(): void {
 		this.toUnbind = dispose(this.toUnbind);
 	}
-}
\ No newline at end of file
+}