There is likely additional values in your fact table that aren’t in your lookup table.
Is the blank value evaluating to anything?
Quickly place it into a table and it should tell you.
Also see what happens if you use the fact dimension versus the lookup dimension. See if there is a difference to the results. Theoretically they should be the same but they likely aren’t due to this problem you’re seeing
The reason i want to use the lookup table is because I’ve grouped the states through the relationship.
Still trying to understand why the blank would come up if they are linked. Ideally it would need to be classed under other. I’ve checked through the data in the fact table and cant see any blanks/or states that are not listed.
Interesting, I didn’t notice the zero. Makes sense though.
Even if there is a hard coded zero then Power BI will registered a result and in this case there wasn’t a corresponding lookup value so it went to blank.
If you just leave it to evaluate to blank then that should work fine as you’ve discovered.