h4 > small element in the log and ref list has a
float: right CSS style. When viewed on screens small enough to make this element collide with its previous sibling, the element will be pushed underneath, which causes the content of the commit/tag to become obstructed.
I tried fiddling around with the CSS but couldn't find an immediate solution... (damn you Bootstrap!).
See this screenshot for example.
This is an issue on the iPhone SE.