It shouldn't because a few lines later in initWithSize,  this->addChild(_container);  will set ignoreAnchorPointForPosition and setAnchorPoint when _container == child.  This is also the case for lines 316-7.

But you are right that existing code for additional children might break due to the change in line 471-2.  This will require a property resetChildAnchors (default to true).  I will add this and repeat the pull request with the correction.