Falsehoods programmers believe about addresses: Google is the source of truth. Bumped into this again today with Foodora, as our address has changed from let's say 15 to 15a.

I can type in "Street 15a" to the address selector, but it forces me to select it from a Google Maps dropdown, and then removes the "a" as I guess it's not yet in Google's data. So even though there are two houses here, 15a and 15b, I cannot specify 15a. Instead I must write it in the additional info box.