Disconnection of network volume not visible from remote

Yesterday I tried to play an audio file using my remote: I clicked several times and nothing happened.
I open the app on my Mac and saw an error message when I clicked on the same file. I discovered that the network volume was OFF (Not visible from AS but still up and running on the Syno).
So, questions are:

  • Why a network volume disconnects without any error or warning appearing on my MAC?
  • Why an attempt to access a disconnected volume is not reported as such on the Remote?

Not a big deal but annoying…

Thanks