Actors/Objects visible inside editor preview window, but not visible in Play mode

Can you create this in a fresh
project?

Yes. I created a new project, imported FBX’s with their animations, setup Matinee, and pressed ‘Play’. At first they worked and I thought it was fixed, but after running it again the objects disappeared as in my main project. I also tried converting my main project 4.9 and the problem is still there.

Does this happen when you create a
project with this animation and
objects in 4.9?

Yes.

Can you link me a screenshot or
YouTube with this happening?

https://youtu.be/kKoaVgcmrh4 You will see me play the scene using Matinee at first, and you can see the lasers and sparks, and then when I enter ‘Play’ mode, the lasers and sparks are gone.

My DxDiag output can be downloaded here Dropbox - File Deleted - Simplify your life

Thanks, .