willDestroyElement is not always called

[ilkkao]

Seeing this problem in my app:

http://emberjs.jsbin.com/cijamo/edit?html,js,console,output

Matching willDestroyElement call is missing.

[ilkkao]

Multiple button clicks in the example seem to cause also a memory leak.

[EricSchank]

Looks like this works as expected in 1.12.1, but doesn't dispatch the willDestroyElement hook in 1.13.1

[elbeezi]

seems related to #12105 and #12080

[GavinJoyce]

I just tried the jsbin on 2.3 and it seems to be working now (I also verified that it is broken in 1.13.1)

@ilkkao perhaps you could confirm that this is no longer an issue for you?