Other than possible cold damage, I would be concerned about possible damage to the roots. The pot looks quite large. As the days got cooler and shorter, it was important to allow the soil to dry deeper into the pot. The large pot tends to retain moisture for a long time around the roots. If you did not make that watering adjustment, root damage could easily occur. Given its current condition and greatly reduced light, it is important to water very sparingly through the winter.
