Tissue recession is usually a water quality or flow indicator, not over-lighting. If the coral had too much light it would start bleaching. Have you recently moved it? Corals expand and poof out at night to catch food particles...then stay expanded during sunrise/sunset to maximize surface area for sunlight to reach the zooxanthallae. During the day, the corals retract some since they obtain enough light.
What are your water parameters & flow like?
Don't blast food at corals. You would probably close your eyes and mouth if someone threw some french fries at you...which is why your Lobo reacts as it does. Instead, turn off all flow, and slowly drop some food from above it. The food will slowly float down (keep fish away) so the coral can react naturally and grab it.
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