Procedural Mesh Component Memory Leak? (UE4)

Has anyone had issues with memory leaks and PMC? I’m using it to update a dynamic world and it seems to constantly leak.
I’ve tried the mallocleak tool and it keeps pointing to the vertex arrays inside the PMC but I can’t see how they would leak so I suspect it’s misleading but it definitely happens only when I am re-generating meshes using CreateMeshSection(…) etc.

Any help or suggestions greatly appreciated.
Thanks.

Seems to be coming from FPhysicsInterface_PhysX::CreateActor().