99% I bet that you have pictures of different heights and it can be even a fraction of a pixel.
Wysota block will not save you, because when you put picsom you will have problems with different lengths of content especially when adaptive.
1 option is pravelno to do previews and pixel to pixel.
2. to avoid 100% this situation in the future can make a small addition in php
Yes, it is not in the layout but all the same
and so you will need to do
Number 12 is empty and visible-lg in your case every 3 div
well sootvestvenno number 12-gel MD every second
what it will give
1. Divas will never crawl what would you not do
2. the height of the DIVS will adjust automatically
3. only standard classes and no Ls for this
4. stability adaptive
5. if the divas will be more than the standard then this change will only affect one row
an example you can look here