With the following CSS the SVG will rotate by 45 degrees and the SVG being referenced by the
<use>
element as well, resulting in a 90 degree rotate.
div:hover svg { transform: rotate(45deg) }
Selecting only direct children of the element we hover over will solve the issue for good.
.another-div:hover > svg { transform: rotate(45deg) }
The issue is not recreatable in Chrome at the time of writing as Heydon Pickering pointed out. Just made a short check and luckily Chrome gets both the examples above right.