Piano puzzle bug: Six won't follow

[Busy Bee]

In the piano puzzle, where you can get the achievement "Mono Tones" Six won't go through the window
Is there something I need to do before she can enter?

[heliangcan123]

Yes,I face whit the qusetion too,but I don't know how dealing whit the qusetion,if you knowing the answer of the qusetion,plase teaching me,thanks.