@jpmslbarbosa It’s a bit confusing, I know, but if your grid has three rows and you want your container to extend to the bottom of the third row, you need to specify the ‘end’ as ‘4’, not ‘3’.
That on its own doesn’t explain why it’s working ok on the desktop, so here’s another possibility: Are the grids on desktop and mobile the same? If you edited one or the other, it’s possible that they aren’t and you’re therefore getting different results on each. It’s also possible that the grid dimensions behave differently at those different viewports. Check to be sure the mobile grid (and the alignment of your container within that grid) is correct.