The dev mentioned they’re working on this. If you haven’t already, you may want to enroll in the beta builds since it’ll be released there first. And they’re pretty stable.
The shirt supplier may also be a factor. An American/EU size M is like an Asian L or XL. So if they changed the supplier then that’s a possibility for the change.
I would take you at your word but since I read it on the internet…
On a more serious note, I didn’t expect so many serious replies given the community. But I did decide to look it up and yeah, apparently it may turn your pudding black. And yes, I knew it’s not a real product. For now.
I think it’s appropriate for me to say this given the place: prove it. Surely there would be no repercussions were you to provide the evidence. As the saying goes, the proof is in the pudding.