Appointments are removed from Google Calendar after they are complete

In the last 2 weeks, all the appointments that were made through Appointments+ and added to Google Calendar are removed from the calendar once they are complete. This issue only started after the last update. Previous versions of the plugin left the appointments in the calendar so we can have a record and some overview. Is there a way to keep the appointments in the Google Calendar after they are complete? Our calendar now shows all the appointments all the way up to March 6 and then nothing until today. It does show future appointments which we suspect will be removed again when they are completed leaving us with an empty calendar.