Content body missing not displayed for some emails

[Cijay22]

Steps to reproduce

1. It appears that the issue is difficult to reproduce and may depend on the content of the email.
2. When the answer button is clicked, the missing body is displayed.

Expected behavior

The email should be fully displayed and rendered.

Actual behavior

Only header and answer button is visible. But the body message is not visible no text not images etc. NC Mail App

Mail as txt Willkommen-email-body-issue.txt

Mail app version

3.7.5

Mailserver or service

Postfix 3.6.4 - Dovecot 2.3.16

Operating system

Ubuntu 22

PHP engine version

PHP 8.3

Web server

Apache (supported)

Database

MariaDB

Additional info

No response

[Cijay22]

Second email with similiar issue

NC Mail app

Roundcube app

Mail as txt

WS Addon Modules [Open Source].txt

[Mic-net]

I guess I have a related problem, my environment is same as Cijay22 (only OS I have is Ubuntu 24.04 LTS).

If I move an email to another folder using Outlook - IMAP4, NC mail does not notice this and still shows the given email in the inbox folder. But without the body of the email, the client reports "Not found". And such an email cannot be deleted.

[ChristophWurst]

Then this is a duplicate of https://github.com/nextcloud/mail/issues/9168