I'm having the same issue with my master measures that was discussed in this thread: Master Items and Duplicate option not visible t... | Qlik Community. It seems the OP solved the problem on their own, but I'm wondering why this issue has occurred (why didn't they publish along with the app?) and what the actual fix is (I don't know how to access the Qlik Sense DB and I don't really want to do this).
We use a custom App.Object_* Read rule:
(resource.app.published="false" and user.roles="DataAdmin") or
The users who are neither PublishAdmin or DataAdmin can read the master items, which leads me to believe the master measure objects aren't being flagged as published.