Unreal Engine 4.7 Preview

[=;222060]
I’m not sure whether has already been reported but I converted a copy of my project (my ocean demo project) from 4.6.1 over to 4.7 - Preview 7 without any, load up project everything looks and works as expected. But after I save & close project and then re-open it again later everything in scene is missing its material:
https:///file/d/0B3u_RPl4K60iaVBFdmhtQjh0Tkk/view?usp=sharing (didn’t want to clutter thread with large images)

I can open up my Skydome or Ocean blueprints and both show up correctly with materials applied in blueprint viewport. I have tried re-compiling materials/blueprints, rebuilding level (lighting is dynamic so no building lights), closing/re-opening, re-compiling code, etc, but nothing changes. I can however take a backup of map from one of autosaves and place it into my maps folder, and then re-open editor and everything is just fine. After saving and re-opening again I go back to image shown above with no materials applied.

Any ideas what could be causing ? Thanks!
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Hey and -

Can you be specific as to how you are setting you Materials? Are they hard set or dynamically set via an Event Graph or Construction Script? Any information you can give us would help us track down .

Thank You