All received emails are displayed duplicate

[platnub]

Steps to reproduce

1. Open any email thread where you received an email
2. All emails received are shown as 2 separate emails but with the exact same content and information.

Expected behavior

Only 1 of each email should show

Actual behavior

All received emails show twice. Every single one.

Mail app version

3.6.1

Mailserver or service

Gmail

Operating system

Nextcloud Hub 8 (29.0.0)

PHP engine version

PHP 8.2

Web server

Other

Database

PostgreSQL

Additional info