Why are Koreans boycotting Uniqlo?

I'm curious to know, why exactly are Koreans boycotting Uniqlo? Is it due to a recent controversy or a long-standing issue? Are they expressing their disapproval through social media campaigns or through other means? And has Uniqlo responded to these boycotts in any way? It's intriguing to see how consumer sentiment can impact a global brand like this, and I'm eager to learn more about the reasons behind this boycott.