‘Load up to X more’ button remains visible in Outbox even when no messages exist

[SuYanqi]

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

9.0b3

Where did you get the app from?

Google Play

Android version

14

Device model

No response

Steps to reproduce

1. Open 'Side Menu' using 'Sandwich' icon in the upper left
2. Click 'Outbox' folder
3. Click 'Load up to 10 more' button
4. Click 'Sent Mail' folder
5. Click 'Load up to 10 more' button

Expected behavior

In step 3, the 'Load up to X more' button should be hidden when there are no messages on the server.

Actual behavior

In step 3, the 'Load up to 10 more' button remains visible even after clicking or refreshing when no messages exist.
In step 5, the button is correctly hidden.

Screen.Recording.mov

Logs

No response