StaticMesh onclicked event doesn't fire when it should

I’m in 5.1 and have the same problem. Checked everything and still no solution. OnClicked worked fine for some time, but along the way something went wrong and I can’t click any objects in the world, only on widgets. Also checked that all widgets are not focusable and have z order 0. Have spent 2 days on this issue and it is annoying as hell.