Missing Puzzle Piece

[Coffinpaws]

Okay so my P's got her fourth puzzle piece just a few minutes ago but when all four pieces connected, there was a hole in the middle and she was all like "???"

I don't think I've seen that happen before. Is there something else I'm supposed to do or..?

 

[RubyLullaby]

Yes, this is supposed to happen

Whenever you got the puzzle pieces complete of a Tamagotchi P´s character you get a piece of Paper of the "construction manual" of the Tamagotchi rocket

You can see the "construction manual" (I hope this is the right word) when you go to the 8th symbol (the book) and then to the first option