I don’t know if that’s a bug or if I even care, but I was just curious about it,so maybe someone can enlighten me.
When you open the inventory you can normally see where you have gotten something new and how much with those little red numbers besides the categories.
But it seems that Aether are not taken for that.
Although there are two new different limit breakers as it’s shown in the limit breaker sub inventory its not shown in the materials sub inventory, there it says just one new item which is the new crafting material.
I’m borrowing this picture from @Ruskin505, here you can also see that it only says 10 new things in materials sub Inventar, but that’s the 10 things from ascension and crafting, it doesn’t show the Aethers.
So if someone only gets some Aethers as a reward and opens the inventory they aren’t shown anything new until they open the limit breaker sub inventory.