Bug with Microsoft booking when services are booked

I have two services on our booking page. Both are assigned to the same staff member

However, even though slots are booked at certain times for this team member, the booking page still shows the same slots. These slots are not bookable. When someone tries to book, it just shows a generic error message. By nature of a booking app though, these time slots should not be shown

The error message is very generic, so a person is not even prompted to choose a different time. I hope this bug can be fixed asap as it is a crucial functionality of a booking app. Thanks!