Why won't HTC Desire 610's screen turn off while charging?

When I charge my HTC Desire 610 the screen stays on and doesn't turn off on its own. I've changed the screen timeout to 45 seconds, but it still doesn't shut off on its own. How do I change this? I don't want it burning out my screen?

Hi there! Check Settings > Developer options, make sure this is off.

Let me know if that changes anything.

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