Last week, Google has updated the address formats used for bulk uploads of your Google local listings. Google called this "improve data for your worldwide locations by following the new address guidelines and sample spreadsheet."
Over the weekend, Elisabeth from Google announced it in the Google Business Helpforums saying:
Address formats are quite different depending on your country. We have made some changes to address format fields for the bulk upload template that are required, optional, or not allowed in different countries based on the format that is used locally. Read more about the new updates here, and check back regularly to our updates page to find all of the latest information on Google My Business features.
You can see the full help document on those format requirements over here.
If you do bulk uploading, you want to make sure your formats are set properly.
Forum discussion at Google Business Help.