Admin
Unfortunately the updated code (without the “order” perimeter) did not change the behavior at all. I still land on an empty checkout page that is not populated and this does not complete the order.
As a side effect your updated code as also reverted the original issue of blocking my Google Analytics UTM link tracking.
I have reverted back to the working code that does not block Google Analytics, BUT DOES result in the checkout page being molested and empty.