duplication on google sync

since about 4 or 5 updates ago, we have noticed that when making a backend booking that we get a duplication on the google calendar.

I have worked out when we make a “pending payment” booking this creates 2 identical entries in google.

But when we make a “confirmed” booking in the back end it creates correctly as only one entry on google.

We have to manually delete the duplicate in google cal where we have only pending payment.