I am using an iPhone X on iOS 11.2.1.
I click on “navigate” to push through the next address to Apple maps. Then after I have arrived, I re-open the browser to navigate to the next address. The browser usually refreshes and I need to re-open my trip and the next address. Because the browser refreshes, my previous trip info is gone.
I will say this happens 100% of the time if I am 15-30 minutes between addresses (I am guessing iOS does this because it is using memory for notifications, etc.) and maybe 50% with any less time. Safari, Chrome, and Firefox, happens on all.