Session with this title 'Enlace para entrar en la sesión de presentación del examen' cannot be recorded

[SergioComeron]

The session with this title 'Enlace para entrar en la sesión de presentación del examen' cannot be recorded.
It also happens with the following:

• Enlace para entrar en la sesión de kkkkkkkkkkkkk del examen
• Enlace para entrar en la sesión de presentacion del examen
• Enlace para entrar en la sesión de del examen

[SergioComeron]

There seems to be a problem with the substr function I use to truncate the recording name from the session name.
When the name is truncated and an accented 'o' character appears at the end, substr transforms it into an illegal character that cannot be saved in the database:
{message: "Error escribiendo a la base de datos", errorcode: "dmlwriteexception", link: "https://aula.udima.es/moodle/mod/jitsi/session.php", moreinfourl: "http://docs.moodle.org/311/es/error/moodle/dmlwriteexception"}

[SergioComeron]

Version 3.2.8 include this