I have been playing with lighting in one of my experiences/scenes, I make changes, save/build and enter to see them (tedious). Until now, all has been okay.
I wanted to see the lighting in a better setting so built the scene using 'standard' for lighting. Saw what I needed but when I returned to Edit, the gizmo was gone. Restarted Sansar, no change, rebooted my PC, no change, Cold rebooted the PC, no change.
In addition, I wanted to see the lighting in a better setting because the first set of lights I setup, were the tint colour I set them at, but after a couple of builds during edits, they now show as a purple colour. No settings in the tint setting changes anything. The other lights are just fine.