Wolrd is scaled, drag is working, but not on grouped sprite

[tet2brick]

Hi,

 

So here's my problem :

 

- I use Phaser.ScaleManager.EXACT_FIT to scale the display area.

- if I enable drag on a sprite, it work.

- if I add this sprite to a group, it doesn't work anymore.

- if I deactivate the game scalling... all is working again.

 

any idea?

 

here is a link for example :

http://sfabw.com/pyramid/app/