Bug / Crash Memory Leak - AccumulateTransmissionURP.shader

[Egate]

Im seeing millions of un-destroyed instances of materials when playtesting called "Hidden/AccumulateTransmissionURP" around 1.9kb each - possibly related to the AccumulateTransmissionURP.shader. 

Frame debugger shows nothing using this shader. 

Memory profiler shows: 
Shortest Path To Root shows "ROOT: Material "Hidden/AccumulatedTransmissionURP"
Referenced by: empty
References TO: Shader "Hidden/AccumulatedTransmissionURP"


Oddly this bug is only apparent when testing on PC. If i test a build on android this leak does not happen. 

Im unsure of how to continue diagnosing this. Anyone have any advice?

Thanks and Thank you for the great physics package!