Thank you both for your answer. I will send you the requested information as soon as possible.
That said, this morning I did some additional tests.
- iPad Pro: the problem is present. I stop the application and restart it, the problem disappears.
- PC: the problem is present. I reboot the PC, restart the application the problem disappears.
Unfortunately, the disappearance of the problem is only temporary. I turn off my PC every night and I see the problem every time I go to “Device Setup”. I must say that my network / end points configuration has not changed for several months and I did not see this problem with earlier versions of Roon Remote.
@noris: when the problem occurs, the DAC is powered on and playing. I do not have this problem onlly with the Pro-Ject Pre S2 Digital Box, but also with the FiiO Alpen E17, the audio output of the PC but not with the BlueSound modules.
For information : What DAC do you use with Roon?