OnTransformChildrenChanged problems

When I try to use this event I get some problematic behavior.

It triggers twice when I add a child to the transform, but it will only trigger when I remove a child if that child gets destroyed. If I change the child's parent to something else the event does not trigger. Does anyone know why this would be happening?

 

there's an open bug in the bug tracker about the double occurrence...

http://issuetracker.unity3d.com/issues/ontransformchildrenchanged-called-twice

 

Submitted my own bug report showing both issues.

http://fogbugz.unity3d.com/default.asp?713431_ajq50h0a6oj2qdhc

 

Just ran into this using 5.3.0f4 Personal. Looks like it has been six months since the bug was logged. Is there going to be any movement on this? Or should I just design around this bug?

 

I just ran into this bug with unity 2017.1.1f1... How can such a bug not be fixed for so long?
Instead of making unity stable and reliable they always add new features with new bugs to the new versions

 

The sad news is, that this basic feature is still not fixed after 8 years.
The good news is, that you can read on how to buy halloween and wedding dresses on the same tracker link.

The reason why the ADD event triggers twice seems to be:
1) first trigger for adding item
2) second trigger for other items having to update their displayList indexes.

Anyone got an idea how otherwise to check for this efficiently? The bad old 'check child count on update and emit, if count changes' comes to mind, but i'd rather skip on that one.