Hi ,
Can you please post this in a new answerhub post as it may be a regression. In the new post, please include the above information along with what steps I can take to reproduce this on my end and, if possible, a test asset/project that I can take a look at to see the error in action.
Sure thing, here you go: Mesh LOD levels do not respect collision settings - Programming & Scripting - Unreal Engine Forums
Hello, I have the same issue when I use custom Foliage Mesh Component with my grass on landscape. Did you managed to fix it?
Update: Setting LOD1 with no collision didn’t change anything 
I will be grateful for some hints, I need to use my custom foliage component with collision (to detect instances with line/sphere trace), but the performance kills it now (I have the same terrible results in profiler, ‘Fetch Results Time’ with really high ms)
PS. I’m on UE 4.12
Hi ,
I am looking into this, however I see that you have already posted on a similar post here. I’d like to keep everything in a single location, so we will continue the conversation on that post once I have a more concise answer available.