Prevent MS Bookings to send confirmation email to customer

Hi,

Is there a way to prevent MS Bookings to send confirmation email(that one including the ics-file) to the customer? 

the setting "Send a meeting invite to the customer, in addition to the confirmation email." is unchecked on the Business and when creating a booking through the Graph-beta API the "optOutOfCustomerEmail"-property is set to True. The email-issue started to appear during the summer.

Thanks!