Automatic Grid Height per Div failure

Hi all,
i use quite the exact same Columns Structure a few times on the same page (Home)…but at the third row the elements shown wrong on mobile only…the height is not self-adjusting according to the give content like text and slider / Images…its is quite one third of the height needed…if i start add minimum height and such it is going to be too complex and opens other problems because of those fixes values…i dont see any cascading css from other CSS ore relative styles or such which might interfere…but maybee i am wrong…i am still sometimes confused what is causing from where possibly…its hard to keep track…any ideas here?
you can also test here…on desktop all fine…on mobile some are fine some not…
its crazy…

thanx so much