Defer-check function/method nodes even when context-sensitive.

src/compiler/checker.ts

@@ -10655,6 +10655,7 @@ namespace ts {
 
             // The identityMapper object is used to indicate that function expressions are wildcards
             if (contextualMapper === identityMapper && isContextSensitive(node)) {
+                checkNodeDeferred(node);
                 return anyFunctionType;
             }