Grid / Layout Bug Flexbox

Hi there!

I have following problem with the Grid / Layout using the flexbox (NOTICE: Open the image with a click to see correctly):


The two col-33 divs space to the left and the right, with one “missing” item in between, but they should be next to each other and the white space on the right side, what can I do?

Thanks in advance!

Just add empty column in the end of the row