I can not seem to replicate the issue, however I do acknowledge that people are having issues with the Canadian geodata.
First, could you check that your address is indeed in the geodata - scroll to it and do a reverse lookup - it should show up.
Could you post the geodata.dat file, a screenshot of the top of the map (so I know exactly what area I'm looking at - could be a center of zip falling outside a boundary issue), and the address you are trying to find.
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