I can confirm this STILL works,post patch. I didn't have to delete anything either.
Also not only is the Bubble Gum glitched,but also the Barrel Cactus in her pocket is glitched to. My advice safe after every 2-4 pickpockets. But note I was like at 20 skill on stealth cause I was on my good playthrough.
To save you from doing another playthrough have a stealth Boy on hand,make a new save file if you are playing as a good person then pickppocket her 50 times. When Achivement pops delete that save file. Thats what I did,saved me time and Skill points
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