Runtime Mesh Component

Hi everyone. I’ve been using Runtime Mesh Components for some time, and something has changed in my build (not sure when it changed). I have custom panels created with RMC, but they are not rendering in the Z PrePass (I’m pretty sure they used to, back in the 4.14 days?) I’m on 4.16 now, and using RenderDoc, I can see that they no longer are part of the depth pre-pass, and thus I’m getting a lot of overdraw, which is killing my performance. I have “Render in Main Pass” checked. Any ideas what could be wrong? Anything I should check? This is a VR app, so performance is crucial.