Cannot enter my address anymore

🚧 THIS IS A TICKET MIGRATED FROM UPVOTY. The original ticket and comments will be available for a limited time over at:
https://abrp.upvoty.com/b/report-a-bug/cannot-enter-my-address-anymore/
———————————————————————————
When I try to enter my address it either completes to the nearest odd number on my street (which isn't very close as the numbering is asymmetric) or to an address with a different number on a different road but the same postcode.

The postcode is CB24 1BW and the "bad" address is 16 Augustus Road (I'm on Stirling Road).