So I don’t totally know what causes this, but I will tell you that rebuilding my landscape material from scratch seems to have solved it. So, I am under the impression that the way the material was constructed was causing some sort of memory leak. It’s worth noting that this only occurred after I tried to convert my textures and materials to Virtual Textures using the conversion window, which seems unreliable. Although it’s much more time consuming, manually changing materials and textures to use VTs seems to be the better solution.
Also worth noting that although I believe I have plugged the leak, I do still get this error whenever I try to do pretty much anything with Packed Level Actors. This, though, I am pretty much chalking up to an engine bug unless I get told we’re seeing the issue in the builds, which I have not yet.