Why does my image look like it’s been infected with a virus when I switch to Lumen Scene mode instead of Lit mode?

Development Rendering
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:smiling_face_with_tear:Why does my image look like it’s been infected with a virus when I switch to Lumen Scene mode instead of Lit mode? It shouldn’t be like this, should it? It looks terrible.

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5f77ad22c9492f07aa011d4a1cbcc6001920×1043 194 KB

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a7358241ee292f5ca1bdd77ec84769cd1920×1041 253 KB