So I had a closer look at what’s happening with my MIDs. They get initialized (the UVChannelData) when calling SkeletalMesh->InitResources(), but only in editor builds!!
So I looked at “InitResources” and it calls a function named UpdateUVChannelData, which does absolutely nothing without editor. Now, I think it’s safe to assume that’s why my MIDs don’t get their UVChannelData initialized either and produce an “ensure”-error.
What’s the point of this? What am I supposed to do?..