Real time lights and occlusion no working

Hey, we are on 5.4f3. We found this bug allready in 5.4b23 but hoped it would be fixed, but its not

B23

5.4f3

I filed a bug report Case 834084
This is threatening our upcoming release, hope to resolve it quickly, thanks!

edit: Oh, we are using SteamVR and Single pass render all settings at SteamVR recommended values. Also if I remove occlusion culling it works, but its not really a fix because the scene will start to lag because of too many polygons rendered

 

Here is a project that reproduces the problem, look down into the floor and try to get the same angle on the SteamVR headset as the spotlight above you. removed SteamVR for size restictions