So this particular error seems to be specific to some condition when the editor breaks from the blueprint followed immediately by a C++ breakpoint. Editor only, I have no reports of this happening during the game play in a build.
I truly wish I had the time and knowledge to work through this issue, but I come up short in both categories.
Unlike this bad boy, which is absolutely catastrophic, and caused me to have to use D3D11 in the first place. Feast your eyes on this:
