refreshObject如何在嵌套的托管对象上下文中工作？

Say I have an object on a parent, main queue concurrency type, and I change one of its property values. Then, without saving, I execute a fetch request on a child, private queue type, to fetch an array where that object is included. The issue I'm having is that sometimes the object I get does not have the pending changes included that were made on the main thread, although it should. Say I have an object on a parent, main queue co