I think your soil is not airy enough and you have over watered her.
Are there drainage holes in the bottom of the bucket?
If not, you are watering more than she needs and it's roots are probably sitting in an anerobic puddle in the bottom.
Also, low humidity helps transpiration speed up, but in extreme low humidity the stomata can close to save the plant from losing water out of the leaves faster than it can pull up from the roots.
So your plant doesn't actually drink as much in the dry as you think, sorry you got bad advice on the previous question. You should not have kept watering.