Answer: Your fig tree is really just acting naturally. In landscape situations where fig trees are planted in the ground, they go into a dormant period during the winter months, sprouting new leaves the following spring. Since you're keeping yours indoors, it is experiencing spring-like weather and is producing leaves and fruit. When you take it outdoors, the tree is shocked at the changes in light, temperature and humidity, and drops its leaves. It will replace the dropped leaves with some that will be better adapted to the conditions outdoors. No matter how peculiar it appears, it's all perfectly normal.
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