Associated bills
At the moment, the invoice disappears under the billing tab for the guest reservation when you transfer it to another customer card/group.
This means that you need to go to the items-tab under the reservation and from there go to the bill that the cost is on.
When there are larger invoices that need to be reviewed and moved around, you need to use CTRL+F, which doesn't really work the majority of the time.
It would have been smoother if it was possible to see the cost on the guest's reservation even if it is not the bill associate.
Also see added items under the booking item's tab and minimize the amount of times you need to jump back and forth between the guest's dashboard to see the items.