Cross-updated bookings are entered into the system as 'Property Closed' bookings.
This means that in order to find these cross-updated bookings, you will need to always have both boxes ticked when searching for booking under Bookings> Search Bookings.
Please note:
Cross-updated bookings are not highlighted as such.
You might need to run the search ones with and ones without having the options ticked, and then compare the results to find them.