Dendrobium Blue Violetta losing leaves

[cabbo]

I understand that some Den. lose leaves while blooming and some during their winter rest (if needed). This plant has seemed very healthy and bloomed for months. It has finished blooming and has been losing leaves for a while. One or two at a time slowly turning yellow and then dying. Is this normal? This picture is a couple months old. Only 5-7 healthy leaves left. Any help or thoughts are greatly appreciated.

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[Angurek]

If the plant is only losing its lower leaves, it might be normal. My plant loses the small lower leaves eventually, but it keeps the upper leaves and grows normally.

If the plant is losing all its leaves, though, I'm wondering how the roots are doing. If the roots are OK, then it might be the temperature. Either the plant is in a warm draft or too close to the cold window.

I like the color of the flowers. Den-phals are awesome.