5.6.0f1 cannot import alpha channel of 8bit-indexed png file

https://fogbugz.unity3d.com/default.asp?893024_q9t1dinl8mv69rbe

Texture:


Preview:

Hi Steven,
Thanks for your help! The issue has already been fixed internally and should be available soon.

Is it fixed on unity5.6.0f2?

No, it might be a different issue than initially assumed after all.

You can follow the resolution process here:

I can’t see any resolution in the link you provided.
Anyway, will it be fixed in upcoming release or patch ?