Using light probes with sprites breaks batching?

I wrote a very simple script recently that turns on light probes for sprites. With the script off, rendering with a single real time directional light, my sprites dynamically batch fine, but when I bake the light probes, and activate light probes for the sprites, they don't batch. Does anybody have a solution to this?

Here's the script I'm using to activate light probes for the sprites:

     void Start () {
         renderer.useLightProbes = true;
     }