Loading bar detached from application header

[Alecaddd]

Checklist

• I have used the search function to see if someone else has already submitted the same bug report.
• I will describe the problem with as much detail as possible.

App

Thunderbird for Android

App version

17.0b2

Where did you get the app from?

Google Play

Android version

16

Device model

OnePlus 15

Steps to reproduce

1. Swipe down to reload the Message List

Expected behavior

The loading bar appears above the first message, attached to the bottom edge of the application header

Actual behavior

The loading bar is detached by a few pixels and a gap is visible.

Rafael confirmed that this is an easy fix and it's just a missing negative margin.
If that's the case, is it possible to add a very simple UI test to ensure the loading bar is positioned correctly?
I'm suggesting this because negative margins might be seeing as a mistake by other developers in the future and it could be accidentally removed.

Logs

No response