[delinend]

I don't know when this problem has started, as I have run playback with Kodi 17 and via FTP, for a long time, without problems.

Appreciate that, but unless anyone knows intuitively what this is caused by (I certainly don't) then there's unlikely to be any progress towards a fix without at least knowing when the problem started which shouldn't be too hard to determine by bisecting these builds, assuming this is easily reproducible (which it should be, for anyone with an FTP server). Maybe a dozen test builds at most.

Sorry. I was lazy...

Here when the problem starts:

#0525(2), 25-May-2017 is working fine !!
#0526, 26-May-2017 is NOT working anymore via FTP and ISO playback

Hope for some help...