Moving to archive marks messages as read

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

When moving messages to the archive-folder the messages are now (since some time recently) marked as read. This was not the case before and partly broke my working with messages (especially when on the road and moving "not that much important" messages to archive to read later on the desktop).
Could this either be "fixed" again or if this was intentional (?) a setting be added to decide whether to mark messages read when moving them?
Other systems don't mark them read - and I personally think that is the right way to handle it ... using a move-action just move things, not more.

Expected behavior

Don't mark messages read upon moving them to archive.

Actual behavior

Messages are marked read as soon as they are moved.

Logs

No response

Start by reproducing the archive action in Thunderbird for Android 9.0b3 on Android 14 and trace the message-move flow. Confirm that archiving preserves the unread state without changing other move behavior, then verify the expected behavior with a focused regression test if the project provides one.