Why does UILabel sometimes become invisible when I use TweenScale

[shinsugita]

Hi there

I attached 2 on the GameObject which UIWidget attached.
And this child is attached UILable.

1. UIWidget and  TweenScalex2
2.   |-UILable
3.  

1st.
PlayStyle = "Once".
Duration = 1
Start Delay = 0
Tween Group = 0
Ignore TimeScale = false

2nd.
PlayStyle = "Once".
Duration = 1
Start Delay = 1
Tween Group = 0
Ignore TimeScale = false

And the UIWidget's "Anchors" Execute setting is "On Enable".

I play it by set deactive and set active like below

1. NGUITools.SetActiveSelf(gameObject,false);
2. NGUITools.SetActiveSelf(gameObject,true);

However... sometimes UILable's text couldn't appear.
it is active and scale is okey. but it can't show in the Game scene

[ArenMook]

Don't scale to/from 0. Scale of 0 is invalid.