Hi there. There's a known bug where the triumph for Wavesplitter catalyst shows complete for players when they haven't actually gotten the catalyst, so you can disregard what the triumph shows. If the catalyst doesn't appear in the slot of your Wavesplitter, then you still need to get it. If you do have the catalyst but it's not letting you insert on the new copy of Wavespliter, please provide a screenshot or video clip showing what appears when you hover on the catalyst slot.