Sunburn from direct sun

What's happening

Pothos evolved under the dappled shade of forest canopy, and Marble Queen's white variegated zones have no protective chlorophyll, so they scorch faster than any green leaf. When strong rays hit the leaves through a window, they burn the tissue, leaving dry, faded, brown-to-bleached patches that don't recover — usually worst on the pale areas of the leaves nearest the glass.

How to fix it

Move the plant back from the window or to a spot with bright, indirect light, or filter the harsh sun with a sheer curtain. The scorched patches won't turn green again, so trim badly damaged leaves at the vine if you want a tidier look; the plant will replace them with healthy growth once it's out of the direct sun.

This is general guidance based on common symptoms; individual plants vary.