Have you tried one of the following options.

Try Restore all first.
Then toggling the intensity blending.
Then make sure the rendering settings aren't all up at 100%, but more around 50%.
The one on the right side, "Shade Mode", is usually only an issue with LAS files and black background. If you set it to "Normal Shading" the cloud is invisible on black background and won't highlight selected points either. Try setting this one to one of the first three in the list.