I'm running into an issue when mapping my company's employee info using the map visual. Employees with zip codes that start with zero do not show up on the map. All other zip codes appear fine. I have double checked that the column is being interpreted by Power BI as a text value and not a number. In fact, when I put the zip codes in a table, the leading zeroes are there. My guess is the map is deleting the leading zeroes somehow which is resulting in those zip codes not being rendered on the map.
Here are two examples of data from RI (where all the zip codes start with 0) and WI: