Tabs Section height issue / bug

Hi, I’m using the tabs section for product overview. However, if any of the tabs has greater height than the first tab displayed, the first tab would be stretched (whitespace is added at the end) to match the height of the longest tab.
Is this a bug? Did I somehow mess up the styles? If I cycle through the tabs, this issue disappears, but it is always apparent on the first page load.
It can be seen here: https://mcomputers.cz/produkty-a-sluzby/vast/#architektura
On other pages, where it was much more noticable, I found a workaround to put the longest tab first, but it isn’t an optimal solution.

Thanks for any tips!