Weird theory

So I’ve have this thing now for a while where I’m confused why Nya and Lloyd where never invited to the tournament of sources. I say specifically Nya and Lloyd Becuase the others from the original team are not elemental masters. Or not born masters anyway. So I’m thinking that the tournament of sources has gone on for a long while, and obviously they have not been busy every single year at that time. The two were still masters, so they would have gotten invitations for a while before DR. So my theory is that for some reason, Wu was intercepting the invatations and keeping them away for some reason. This just feels like a very strange thing for him to do. Y’all have any ideas about what other reason Nya and Lloyd would not get invatations? Or why Wu would keep it from them.
Also, why wouldn’t Wu get them? He was also an elemental master.