certain bugzilla links in emails open (not default)chrome instead of firefox

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

stock android 11

Device model

sony xperia 1 (2019)

Steps to reproduce

1. Get an email from some bugzilla bug you followed with email notification
2. Click on the link to e.g. an attachment

Expected behavior

It opens in firefox

Actual behavior

It opens chrome instead of the default firefox. But chrome opens without going to any link.
The long press menu also doesn't work on those broken links.
The links do work normally after clicking "Show unformatted message", when unformatted it does open in firefox and the long press menu also works properly again.
Example "broken" link: https://bugzilla.mozilla.org/attachment.cgi?id=9590225&action=edit
I think I had it in other email as well but the vast majority of broken ones have been bugzilla

Unformatted:

Formatted

Logs

No response

EDIT: If necessary I can forward the offending email so it can be reliably reproduced.

Start by reproducing the issue in Thunderbird for Android 19.0 with a formatted Bugzilla notification containing the attachment link https://bugzilla.mozilla.org/attachment.cgi?id=9590225&action=edit, then compare it with the unformatted-message behavior. Done means formatted links open in the user's default Firefox browser and the long-press menu works normally.