I created default level, i added widget (Button) with GEngine->GetGameViewportWidget()->SetContent(SNew(SMyButtonWidget)).
When i launch game in editor, and press button (not click, i.e. LMB down, without up), then Skyes stop movement, scene become fixed. When i release button, then scene continues movement.
I thought Slate widgets does not affect Scene/Draw, i really expect that, i really need my scene always move, even when i press buttons etc. Is it a bug?