One user is removed from database when the debugger hits a breakpoint.

Hello! :D
I have very weird problem.
One user is removed from my database when the debugger hits a breakpoint.

* Operating System version: Windows 11
* Firebase SDK version: 5.4.0 and 4.5.2
* Firebase Product: auth
* Python version: 3.8.12
* Pycharm version: 2021.2.3 Professional Edition Build 212.5457.59
* Pip version: 21.3.1

https://drive.google.com/file/d/1Pn4vHd_87C5pweNzh8JvYKkoNvagiNz4/view?usp=sharing

#### Relevant Code:

```
import firebase_admin
from firebase_admin import auth

firebase_admin.initialize_app()

if __name__ == '__main__':
users_claims = {x.uid: x.custom_claims for x in auth.list_users().iterate_all().items}

for user_id, claims in users_claims.items():
print(user_id)

print('BP')
print([x.uid for x in auth.list_users().iterate_all().items])
```