Firebase Firstore Doc.Get does not let angular universal to resolve

I'm reporting for the first time so if I'm making some mistake let me know.

The thing is that I'm working on an angular app that uses angular universal and firebase as backend. When hosting, i use a cloud function to Server-Side Render the website for SEO and preview, as usual.

But, it took me 4 weeks to discover what was wrong with my code, at some point, the ssr just stopped working. The request to ssr function always times out.

Then last week I've been rewriting the WHOLE app, and testing it step by step, until i notice a bug that happens when working with angular and firebase-admin (firestore, to be more precise)

When I insert a firestore.collection('collectionPath').doc('docId').get() the ssr part of the app just stopped working. There's something inside this that holds angular to return the html response. I've been conducting lots of testing, indeed, the get request works normally.

I've followed the whole callstack and there's something that holds angular in place preventing the returning.

I make two more requests at the same time, the first was a query, taht worked perfectly. When i inserted the doc().get(), it stopped working. I'm not able to give you more details because I'm noob in this kind of thing, but if you beed any additional let me know.