Question about Zones & Ambient Lighting


Hey all,
I’ve been messing around with creating a zone in my sandbox and had gotten one to my liking through using Ambient Light. However, when I leave my sandbox and come back to it, it acts as if it is turned off. All of the settings stay the same, but the shadows go back to being pitch black. I have tried several times to get it to work, but whenever I change the ‘Ambient Intensity’, there is no visual change in the lighting–whether it is set to 0.1 or 5.0. There are times when I can get the Ambient Intensity to work properly, but most of the time it seems to be broken. I am just wondering if this is a known bug or if there is something that I am missing in getting this set up? Any feedback would be much appreciated!