display error in folder structure

[Tived]

I have an display error with my folder structure from wevserver.

Expected behavior

Screenshot from Webmail:

Actual behavior

Screenshot from the Webmail App in Nextcloud:

Mail app

Mail app version: 1.4.1
Mailserver or service: Roundcube 1.4.7

Server configuration

Operating system: ‪Debian 9.13‬
Web server: (e.g. Apache, Nginx,...)
Database: MariaDB
PHP version: 7.3.21
Nextcloud Version: 19.0.0 and 19.0.2

Client configuration

Browser: Google Chrome
Operating system: Windows 10 Home

[dehnhardt]

Fixed with #3147.