Congrats on your new Jackson's girl!
As leedragon mentioned, it can be a symptom of nutrients being missing from her diet.
Since there could be fertilizer pellets, moisture pellets, sticks, pebbles or insecticides in the dirt--it's best to keep her from continuing that.
Does she have the crickets lightly dusted with plain calcium--no D3 every other feeding?
Are the feeders lightly dusted with calcium with D3 once a month?
Are the feeders lightly dusted with a multivitamin once a month?
This is the typical dusting/supplementing schedule for Jackson's--more often is
not better for Jackson's and other montane types of chams.
Does she only get fed crickets ?
Variety in her diet is important.
This place has a good variety of feeders but maybe you're luckier than most and have a store nearby with plenty of variety
http://www.mulberryfarms.com/
If you want to know if there is anything that could be changed to ensure that she stays healthy for you, spend a couple of minutes cutting and pasting the questions from and adding your answers to these:
https://www.chameleonforums.com/how-ask-help-66/
If you can add pictures that helps, too.