Firebase – Snapshot listener doesn't work after I initialize him in onCreate. Firestore android studio

I have this Snapshot listener that checks when a chat model is added or modified I want it to give it to me, but the snapshot listener works only when the activity starts and from there, it stops working. The problem is that it doesn’t even goes to the onEvent()…
this is the function where I initialize the snapshot listener.
the function triggered in the onCreate function.

private void addChatRoomSnapshotListener() {
    chatRoomsListener = chatsQuery.addSnapshotListener(new EventListener<QuerySnapshot>() {
        @Override
        public void onEvent(@Nullable QuerySnapshot value, @Nullable FirebaseFirestoreException error) {
            if (error != null) {
                error.printStackTrace();

                return;
            }
            for (DocumentChange change : value.getDocumentChanges()) {
                switch (change.getType()) {
                    case ADDED:
                        ChatModel chatModel = change.getDocument().toObject(ChatModel.class);
                        chatModel.setId(change.getDocument().getId());
                        chats.add(chatModel);
                        adapter.notifyDataSetChanged();
                        break;
                    case MODIFIED:
                        Toast.makeText(getApplicationContext(), "modifeid", Toast.LENGTH_SHORT).show();
                        // Handle modified document
                        ChatModel modifiedChat = change.getDocument().toObject(ChatModel.class);
                        modifiedChat.setId(change.getDocument().getId());
                        // Find the position of the modified chat in the list
                        int modifiedIndex = findChatIndexById(modifiedChat.getId());
                        if (modifiedIndex != -1) {
                            // Replace the existing chat with the modified chat
                            chats.remove(modifiedChat);
                            chats.add(0, modifiedChat);
                            adapter.notifyDataSetChanged();
                            break;
                        }
                }
            }
        }
    });
}

here is how I remove the snapshot listener.

@Override
protected void onPause() {
    super.onPause();
    // Remove the snapshot listener to avoid memory leaks
    Toast.makeText(getApplicationContext(), "listener removed", Toast.LENGTH_SHORT).show();
    if (chatRoomsListener != null) {
        chatRoomsListener.remove();
    }
}