PHP 7 & JEM Módule-Teaser

JEM - Módule-Teaser does not work with php 7, correct with php 5.6.28

How do you know that,? I am on php 7 and use module teaser too and don't encounter any problems.
Please post error notices or something to reproduce the error.

Joomla 3.6.4
Package: 2.2.0 stable September 2016
Componente: 2.2.0 September 2016
Módulo Básico: 2.2.0 May 2016
Módulo Calendario: 2.2.0 August 2016
Module-Banner: 2.2.0 May 2016
Module-Jubilee: 2.2.0 May 2016
Módulo Teaser: 2.2.0 May 2016
Módulo Ancho: 2.2.0 May 2016
Plugin-Content: 2.2.0 December 2014
Plugin-Finder: 2.2.0 January 2015
Plugin-Search: 2.2.0 June 2015
Plugin-Comments: 2.2.0 December 2014
Plugin Mailer: 2.2.0 August 2016
PHP: 7.0.13
GD: bundled (2.1.0 compatible)

Molto strano. Non posso riprodurlo. Bisogna piu informazioni.
Template, other modules than the official core...

Sounds rather like an encoding problem:
php.net/manual/de/function.mb-internal-encoding.php

@hekla: what do you think: it's a problem inside of JEM, or inside of the settings of Qtal ?