Area lost in random classification

snap
#1

hi，
i used L2A level sentinel-2 data that downloaded from [https://scihub.copernicus.eu/, there are some area lost in some bands like this,

image
image1287×857 308 KB

and then ,i found if the feature band include at least one band like that,the result will also became this.
so i want to know how to get a full image after random classification.
thanks

#2

looks like the product is corrupt. Have you tried downloading it again, maybe from other sources, for example from: https://peps.cnes.fr/rocket/#/search