I could be wrong, and I’m too lazy to Google at the moment, but I swore this was made public information long ago. When I was young, aspartame was being phased out in favor of sucralose. I recall hearing stories about aspartame being banned in other countries as a child.
It wasn’t. They stalked one of the artists and found that other designs (which weren’t released at Target) had some of that imagery. Absolute insanity.