In old client this wearables had sparkles emission. Right now emission power feels like 0, while it's set to 1 in Blender. Lot's of wearables with "sparkles" is broken now, emission itself on lots of wearables feels much lower.
It's also a a huge problem for wearables creators, because we can't test new emission in OLD CLIENT WEARABLES TEST SERVER! (Which is another problem. Please bring us new testing options, for example, button to test wearables in NEW CLIENT, instead of browser)