I tried removing and and recreating materials and stage views manually after reset/load but no dice. (A8)

Someone else correct me if i am wrong but I'd say this is a bug that engine forgets to destroy/recreate some internal stuff when actual d3d lost/restore events occur(when you are using PP views.)

IF that's a bug, don't think it will ever get fixed, considering the state of engine development in the last couple of years.