Answer: I think your lantana is responding to the changes in light, humidity and temperature it is experiencing indoors. It should recover soon and you can prune back the stems with dead (or no) leaves. As soon as it adjusts to growing indoors it should produce healthy new leaves. Give it bright light, keep the soil on the dry side and pinch back the tips of the stems to keep the plant compact. You don't want too encourage too much growth during the winter months, your goal is to keep it alive and happy. It will make up for lost time in the spring when you take it back outdoors.
Best wishes with your lantana!
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