MariaDB displaying special characters in Nagios DB

Hello,
I came across a problem in my MariaDB Nagios Database. The nagios_objects tablespace is displaying special Characters instead of host and service names.
Here is an example of how it looks like when it displays special characters (phpMyAdmin)

Now in the same database and in the same table (nagios_objects) I also have values which are being displayed correctly (name1: hostname, name2: servicename). It seems that after a while Nagios started to write special characters into the table, but I'm not sure about that and I also don't know what the reason could be. Maybe you guys can help me, please
I am using Nagios Core 4.3.4 with ndo2db 2.1.2. The MariaDB Database is on a seperate VM with MariaDB version 5.5.56.
Kind regards!
I came across a problem in my MariaDB Nagios Database. The nagios_objects tablespace is displaying special Characters instead of host and service names.
Here is an example of how it looks like when it displays special characters (phpMyAdmin)
Now in the same database and in the same table (nagios_objects) I also have values which are being displayed correctly (name1: hostname, name2: servicename). It seems that after a while Nagios started to write special characters into the table, but I'm not sure about that and I also don't know what the reason could be. Maybe you guys can help me, please

I am using Nagios Core 4.3.4 with ndo2db 2.1.2. The MariaDB Database is on a seperate VM with MariaDB version 5.5.56.
Kind regards!