Ficus aren't picky, just opinionated and quick to show their displeasure by dropping leaves. Rotating won't cause leaf drop but if your tree has always been in the same place and care hasn't changed, look for other reasons that might cause leaf drop.
When is the last time you repotted? A larger pot isn't necessary, especially if you want it to continue to live in the house

but periodic soil refreshment is. Old hydrophobic soil will cause leaf drop.
Do you fertilize? If so, with what and how often? Trees, especially trees in pots, don't need fertilizer as often or at the recommended strengths. Once or twice a year at most with balanced fertilizer used at 1/2 or less strength is enough. Nutrient deficient soil will cause leaf drop.
Last spring when your tree had a problem, did you forget to water when new growth was starting? That will cause leaf drop.