Google Calendar integration doesn't show 'Event description' when appointment is made

When someone makes an appointment, the new appointment is added to a Google Calendar like it should be. Unfortunately the details given the person who made the appointement are not added to the appointment in Google Calendar. So the new appointment in Calendar does not have a topic name, nor are the name, e-mailadres, requested service, and telepone listed at the description of the appointment (so the appointment is blank, only the times are correct).

This is strange because when I test the connection with Google Calendar, the test appointment does have these values added to the event added in Google Calendar. So the connection with Google is working, only the event description (details given by consumer) are not added to a new appointment.

Could you help, please!