The Starting point of the route? Have origin pickup and then route from there
The addresses are processed in the order they were sent, so the first address in the deeplink should be the starting point in the route.
There may be an exception, if you’re on the free plan and overusing the free geocoding services, or if the address is hard to geocode as such, the first address may get “delayed” when being processed and come in second or later.
If you want us to check, you can post the deeplink here, or send it by email to email@example.com