Do reflection probes work in WebGL?

I am trying to get baked reflection probes to work in webgl but they are showing up incorrectly in the builds. In the editor they are fine. It seem to break at the edges of the geometry. I've created a simple scene with a default unity plane (I used the plane rather than the quad to demonstrate the effect easier since it has more topology) which is using the standard shader with smoothness set all the way up. There is a single baked reflection probe.

Everything looks fine in the editor.

In the webgl build the reflections appear jagged at the edges of the geometry.