Values for animation-delay interpreted as classnames

[jimmed]

I have a CSS animation, with the following property set.

.animatedThing {
  animation-delay: 1s;
}

After updating from 0.14 to 0.15, the animation-delay value (1s) is being interpreted as a class name, resulting in some output CSS like so:

.Component__animatedThing__<hash> {
  animation-delay: Component__1s__<hash>;
}

Naturally, the desired behavior is for the value to remain 1s.