Configuration of "notification actions" not working

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

19.0

Where did you get the app from?

Google Play

Android version

Android 16, Samsung One UI 8.5

Device model

Samsung Galaxy A55 5G

Steps to reproduce

Open Thunderbird App
Open hamburger-menu on top left
Choose settings
Choose general settings (German "Allgemeine Einstellungen)
Choose Notifications
Choose Notification Actions (German "Benachrichtigungsaktionen)
Configure up to three actions and sort as desired

Expected behavior

I am expecting that the before chosen actions will show in the next "new message notifications" as clickable actions, in the desired sorting.

Actual behavior

No matter how many actions in whichever sorting I configure, I always see "read | answer | favorit".

Also / Already tried:

• restart of device --> no success
• force-stopp of app and clearing cache --> no success
• force-stopp of app and de-/re-activate android/system notification settings for thunderbird app --> no success.

Logs

No response

Start by reproducing the issue in Thunderbird for Android 19.0 through Settings > General settings > Notifications > Notification Actions, then compare the configured actions and order with a new-message notification. Done means the selected actions appear as clickable notification actions in the configured order; the issue provides no files or tests to target.