Unity 5.3.1f1 crashing in glDrawElements

Has anyone else experienced crashing in Unity 5.3.1f1 on iOS with EXC_BAD_ACCESS in the following stack trace?

• gleRunVertexSubmitARM
• glDrawElements
• :: DrawBuffers()
• :: DrawMeshBuffersRaw()
• :: DrawMeshRaw()
• :: Render()
• :: Flush()
• :: PerformRendering()
• :: DoForwardShaderRenderLoop()
• :: DoRenderLoop()
• :: DoRender()
• :: Render()
• Render [inlined]
• :: StandaloneRender()
• :: Camera_CUSTOM_Render()

We see this sporadically on all our iOS test...

Unity 5.3.1f1 crashing in glDrawElements