Viewport widget rendering not working when "Launched"


I managed to render a viewport widget and spawn actors inside it.
Problem is that when I play on editor ( standalone also ) viewport widget is working fine, but if I launch it ( “Launch” button from editor ) objects inside are not rendered.

In the second case I get the following message on the output continuosly:

LogPlayLevel:Display: RoboWorld: [2015.01.29-11.44.10:877][818]LogRenderer:Warning: Reallocating scene render targets to support 232x232.LogRenderer:Warning: Reallocating scene render targets to support 640x480.

I’m attaching screenshots.

How can I fix this?

Have you used any SceneCapture components? They seem to cause this but I can’t work out how to make it stop the error.