Its very weird behaviour. Im using steam vr with the player prefab. The hand collisions are working fine until I grab an object (Throwable) and release it. After that my hand (which grabbed the object) doesnt collide with the environment anymore. UNTIL the hand touches a more detailed wall with mesh collider. Then the collision starts working again and the hand collides perfectly with the environment. I have absolutely no idea what is happening. Ive removed the player prefab from my scene and added a new one. Same problem…
I had big boxes in my scene with a box collider with Trigger selected. Instead of using very large trigger zones I scaled them down and removed some after they have been triggered. Later on I had the same problem again with the hand collisions and how I fixed it was by placing a new Player prefab in my scene and test if that one does work. That one did work. So I compared my Player prefab with the original one and noticed that I had placed a trigger zone around my hands to be able to select menu items for example. I removed the zones and the problem was solved!