The new ui is awful, doesn't get me excited to look for mods, i just stare and hope to find what i'm looking for before it's annoying me enough to close the website.
It seems to only happen to me with the Overcast weather setting. Looking at your video it seems to happen with an overcast type of weather. Check what weather type is loaded within NAC and disable it. I ended up disabling 2 overcast type of weathers and no more flickering!