Material rendering with passthrough

Hey all - sorry for pasting in a tweet but I don’t have the video on my phone! 

This is the issue I am having: https://twitter.com/roydmagnuson/status/1506010679668576261?s=21

As you can see the material is rendering behind the UI element when passthrough is active. The UI is using mobile/particle/additive and the swirly thing is using a Tilt Brush shader.

This project is using MRTK and, what is weird is that I have another project setup using XR Interaction and Oculus passthrough and this doesn’t happen - it just renders fine in passthrough. 

I spent a good chunk of the day learning about render queues and have tried everything I can think of/seen. Just can’t seem to figure it out, and I can’t shake the feeling that it isn’t that complicated to fix. Any help would be greatly appreciated!