fabric.Group.addWithUpdate() re-applies transform matrix to existing group objects

[lorenzopolidori]

When using fabric.Group.addWithUpdate() to add existing canvas objects to a group on which some transformations have been applied, the same transformation matrix is applied again on the existing group objects, resulting in a double rotation and scaling.

This behavior can be reproduced using this jsFiddle - just click on the group first two button and then on the group third one.

I suppose the correct behavior is to apply the group transformation only to the object added last and leave the existing ones untouched.

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[kangax]

@Kienz please take a look if you have a chance. Thanks!

[ghost]

Is there any known work around to this problem?

[asturur]

http://jsfiddle.net/cjUdb/3/ see updated fiddle for solution.