scheduling Aquity Scheduling Google Calendar links only exporting one session

My client has noticed an issue with the Calendar Export Links within Scheduling for Google Calendar.

When booking an appointment with a number of sessions, that has the 'Clients must sign up to all sessions' box is selected in appointment settings, (making a series of sessions bookable all at once) After a booking is confirmed both the confirmation page and email buttons that allow clients to download the appointments straight o their google calendars only adds the last session dates, not all the session dates.

I use iCal and it works fine and downloads all the dates when those buttons are clicked. 

These buttons are automatically generated by Squarespace, but I'm thinking perhaps it's a Google problem. Any advice would be very welcome!