gmail.new.get.thread_data() always returning null or undefined

[Georg7]

I've preloaded gmail.js and have a valid thread_id (user is viewing the thread). When I call gmail.new.get.thread_data(threadId) it always returns null or undefined.

Gmail.js is preloaded similarly to how it's demonstrated in the boilerplate https://github.com/josteink/gmailjs-node-boilerplate/blob/master/src/extension.js#L4

 gmail.observe.on("view_thread", function (obj) {

      const threadId = gmail.new.get.thread_id();

      const threadData = gmail.new.get.thread_data(threadId);
      console.log(threadData);
    });

[josteink]

I've tried to reproduce on my machine, but it seems to work for me. Without reproducing, it's hard to tell what's wrong.

Using the boilerplate repo, what does Object.keys(gmail.cache.threadCache).length say if you try it in a web console after loading Gmail?