My Caladium Lindenii is losing leaves, left with only one now.. Another Caladium Siam moon came with 6 leaves, now left with 3 leaves. Both plants are in the balcony with indirect sunlight. I repotted both recently into a potting mix suitable for foliage plants and last check, there is no root issue. I was told that Caladium goes through a stage of dormancy. Need your advice! Thank you very much.