Unity 5.3.1p1 randomly crash on Transform::CalculateTransformMatrix(Matrix4x4f&) const

From our iOS crash log,unity 5.3.1p1 randomly crash on
Transform::CalculateTransformMatrix(Matrix4x4f&) const (in towerhero) (Transform.cpp:1227)
called by
UI::CanvasRenderer::SyncTransform(UI::CanvasRenderer::SyncFlag, bool) (in towerhero) (CanvasRenderer.cpp:581)
:
Date/Time: 2016-01-04 11:06:32.32 +0800
Launch Time: 2016-01-04 10:04:20.20 +0800
OS Version: iOS 9.2 (13C75)
Report Version: 105

Exception Type:...

Unity 5.3.1p1 randomly crash on Transform::CalculateTransformMatrix(Matrix4x4f&) const