We have the same issue. Seems like State changed to 5,1, in BC 19. When you select the country and select the customer in page inspector you can see County (for US). But in general the name is 5,1 (which replaced State). I hope someone can notify Microsoft about this.
Other strange issue is when in Customer List you use Edit in Excel and try to open the Excel file it shows an error message that file is broken.
