Embedded PNG not shown or able to save

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

21.1

Where did you get the app from?

Google Play

Android version

17

Device model

Pixel 10 Pro

Steps to reproduce

An embedded png is not shown, only a picture placeholder. No way to interact with.
Also no option to save it.

Message code:

--b2=_lUFvujrAmuBVEk6bpR98BZel4Q0Dc94Nal6MEAUasM
Content-Type: image/png; name=qr_code.png
Content-Transfer-Encoding: base64
Content-ID: <qr_code.png>
Content-Disposition: inline; filename=qr_code.png
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I don't paste all...

Expected behavior

Show the qr-code an offen an option to save

Actual behavior

Thunderbird doing nothing.

Logs

No source files or tests are named in the report. Reproduce the issue in Thunderbird for Android using the supplied inline image MIME sample, then trace embedded-image rendering and attachment actions; done means the QR code is visible and can be saved.