Basic Gallery elementor problem

Hello, im trying to finish my new website and im with a problem, when I create a basic gallery in portfolio page, I put 4 columns and I start to upload the photos but they never are in the same column.

Example: if I upload like 20 photos and choose 4 photos in each column, I get 4 images on first column, then 2 images on second column, then 1 image on third column, then four again and so on… any help please???