Is my plant sun damaged?

Hi everyone! One of my begonia leaves is looking weird / browning in a weird way… The plant is happy otherwise, as far as I can tell. The photo is how the plant lives / is positioned, you can see the weird leaf like bottom-middle of the plant.. could it be sun damage? maybe with the days getting longer this is no longer a good spot for her? I don't really know if this is what sun damage looks like though