From the Doraemon movie 'The Record of Nobita's Parallel "Journey to the West"'.

Wow, what a nostalgic work! It's a movie I love too. You should be able to find it in the scene where the protagonist tidies up the dream items right before returning to the real world ♩

So that was the timing. I thought it was when Nobita's parents forcibly brought him back by pressing the stop button, and later the fairy Silk came out of the dream machine... Silk's face is modeled after Shizuka.