Grid not displaying correctly on large-screen Safari

[siy34]

As can be seen in the attached screenshot, the 4th "large-3 medium-3 small-6 columns" element in a "row" div got pushed down. The issue only comes up for Safari when the screen width is above the "large" threshold (e.g. one that runs on iMac or Macbook). Smaller-screen Safari (e.g. ones that run on iPad and iPhone) other browsers such as Chrome, Firefox, Edge don't seem to have the same issue. Any ideas what might be the cause of this?