Player freezed with speedtree and b18

Unity Engine
1

Hello,
I have tried my test scene with b18. But it doesn’t works.

I have managed that after removing all tress from terrain playing scene works.
After I add one speedtree, player will freeze.

I’m using realtime GI and directional light.

Created case 658648

Regards
Peter

2

I have tried to delete whole library folder and reimport speedtrees but that doesn’t helped

3

speedtrees work fine on my end