Is there something wrong with Application.persistentDataPath (on Samsung s6 running Android 5.1.1) ?

I’m trying to write files to the SD card. Application.persistentDataPath returns /storage/emulated/0/Android/data/com.mettavr/files/ However there is no such 0 folder:

$ abd shell
$ ls /storage/emulated 
legacy

So all I got is a IsolatedStorageException: Could not find a part of the path . If I manually replace Application.persistentDataPath by /storage/emulated/legacy/Android/data/com.mettavr/files/ it works fine (not sure this is what I should use because of the legacy thing but it runs so…)

Is that a known thing? Am I missing something?

Unity says it is fixed in 5.6.0, but I can reproduce it on 5.6.4.
So it is not fixed actually. Please Unity.