"Objects have different Materials" on same-material transparent objects

I have a glass material which is simply a standard shader with transparency.
When I disable transparency, I can get my test scene to be rendered in two batches.
With transparency enabled however, the scene turns into dozens of batches and dozens of non batched objects.

The ‘fail’ message I get in the frame debugger is ‘Objects have different materials’, however this is clearly not the case.

Is there any settings that can be changed to better handle this situation?
In short, I just want to be able to have my glass bottles batch properly.

Bit more relevant information:

  • Nothing else in scene
  • Current testing camera is oriented down on a grid of bottles, so there’s no overlap
  • Deferred Rendering

I’ve been having the same problem. Any updates on this, @Randomman159 ?