Mon Feb 13, 2017 8:45 pm by ami289
I can confirm that I have the exact same issue.
Running Serviio 1.8 on a Windows 7 x64 machine.
I have only one DLNA client on my network, with a static IP address, so I didn't see a reason to have 'Enable access for new devices' set.
But even though I set my device to 'Allowed' (and then press save, of curse), Serviio seems to 'forget' that setting, and I have to re-set this device to 'Allowed' frequently.
I haven't gave it much attention so I can't tell you when this occurs (computer restart, DLNA client restart, etc.).
I eventually stopped using this feature, and just have 'Enable access for new devices' set.
Personally, it doesn't bother me,
But just wanted to let you know that you are not the only one experiencing this issue.
And at the time, I couldn't find a solution.
Even though I have stopped using this feature, I am curious to what causing it.
So if you do find a solution, I'll be glad if you could also post it here.
Good luck mate, and sorry I couldn't be much of an help.
By the way-
I don't know if it matters,
But not only my DLNA client have a static IP address,
Serviio also successfully recognizes the device name.
So it had always 'forgotten' an allowed device with known and fixed IP address and device name.