This NO_FLUSH is needed for meshes because evaluated mesh might reference arrays which will be re-allocated by copy-on-write. This isn't a case for curves/larttices where display list is a self-contained unit. So technically, this change is not correct.

Think better approach would be something like this: P758

P.S. This is sort of duplicated logic of what's happening in on_visible_update, but we should get rid of it in the longer term, and do all related logic in deg_graph_build_finalize. This is because it's not very well defined when on_visible_update is to be called, it really more like hey, new entity is added to depsgraph, how do i make it up to date (without ruining possible caches).