Using # as secondary designator results in inconsistent behavior

[bluenike]

We have an html input for address entry. We use Google Maps Autocomplete to provide suggestions. Google Maps doesn't handle secondary designators very well during interactive input, so we use parse-address to remove the secondary designator. For this reason, it's important that parse-address acts consistently with partial input (as the user is typing).

Input: "10 miller pl Unit 505, san fran"
Output: {"number":"10","street":"miller","type":"Pl","sec_unit_type":"Unit","sec_unit_num":"505"}
Comment: Correctly identifies secondary information as "Unit 505"

However--

Input: "10 miller pl #505, san fran"
Output: {"number":"10","street":"miller","type":"Pl"}
Comment: Does not correctly identify secondary information as "#505" until the entire address is completely entered.

Input: "10 miller pl #505, san francisco, ca"
Output: {"number":"10","street":"miller","type":"Pl","sec_unit_type":"Unit","sec_unit_num":"505"}
Comment: Correctly identifies all components.