Different height of rows in sub-grids

Hi everyone!

On our form, we have a tab with two similar sections. Each section contains a sub-grid.

Properties of both if these sub-grids are similar (only views are different). Number of rows set to 4.

But in CRM we can see that rows for both sub-grids rendered in a different count of pixels (see attached screenshot).

Does anybody know what could be the problem?

Thanks in advance!