docData observable stream emits identical object values multiple times in a row

### Version info

**Angular:** ^18.0.0

**Firebase:** ^10.13.0

**AngularFire:** ^18.0.1

**Other (e.g. Ionic/Cordova, Node, browser, operating system):**

"@ionic/angular": "^8.0.0",

Tested on MacOS Chrome, but reproducible elsewhere. Else let me know.

### How to reproduce these conditions

Simply press the update button after strating this project, it will update the game entity and make it emit twice:
https://github.com/folsze/firebase-observable-double-emission

here is a related stackoverflow post that I created:

https://stackoverflow.com/questions/78891192/firebase-docdata-stream-emits-identical-object-values-multiple-times-in-a-row

**Steps to set up and reproduce**

run with package json npm run

then simply press the update button, it will update the game entity and make it emit twice:

### Debug output

** Output from `firebase.database().enableLogging(true);` **
<- I have no idea what this is suppoed to do for me. I added this but receive no logs:

import { enableLogging } from '@angular/fire/database';

enableLogging(true);

### Expected behavior

It only emits once

### Actual behavior

it emits multiple times (twice currently for this simple scenario):

Comece pelo projeto de reprodução vinculado firebase-observable-double-emission e seus package scripts; execute-o e pressione o botão de atualização para observar o stream docData. Compare as emissões idênticas repetidas com a emissão única esperada, usando como contexto a discussão fornecida no Stack Overflow e a observação sobre logging.

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