I did a profiling pass of our game. Were I noticed something new whenever a item was being touched allocation went up. I boiled it down to OnCollisionStay, and its not our code. its the actual OnCollisionStay that allocates. Even with an empty method signature it allocates. Regression bug maybe? Is it a known problem?
https://unity3d.com/unity/beta/2019.1.0a7 Seems to be a regression, im using 2019.4.12 and it allocates