Would anyone know what the problem is with the light?
As you can see in the video, at a certain distance, the light and the objects look good, but after that distance the world is overexposed and the light looks worse and when making the video it changes as if it was the limit of some plane.
according to Lumen GI and Reflections feedback thread - #1374 by Krzysztof.N hdri backdrop is not compatible with lumen. the geometry is not always visible in the lumen scene to trace for the influence. it surely faded out at the distance. i reckon that’s the line you see. just remove the backdrop and use the hdri in the skylight. and tweak it’s intensity so it looks alright.