I can confirm I am having the same issue, after random lengths of time of receiving a local FM station (yeah I know “Brain the size of the universe, and here I am parking cars”) SDRAngel spectrum stops updating, audio output ceases, looking at the LED’s on the LimeSDR, I see one LED flashing red to show there is a pulse of data around every second (is normally on solid RED when data is being decoded). To recover, I have to disconnect and then reconnect the LimeSDR to the USB3 connector, click on the Sampling Device Refresh button, then can restart the sampling device. I do not have to shutdown SDRAngel to recover. The PC that I am doing this testing on is Windows 7 64bit older laptop, installed Pothos today, but have not updated the firmware on the LimeSDR which is reporting as FW 3, HW 4, GW 2 Rev 8, via LimeSuite 17.12.0 build date 2017-12-31.
PS Additional information: I have now just noticed, while the data coming back from the LimeSDR for decoding the RF signal seems to have stopped, interestingly I can shutdown the SDRAngel software and restart it (without cycling power to the LimeSDR) and see the software is able to read the Lime’s temperature, just not get the RF data, maybe this will help someone to identify what part of the communication chain is falling over.
PSS I have now used LimeSuite to see what data it can read from the LimeSDR, and it is showing the classic GW 0 Rev 0 error, reseting the LimeSDR (cycling power to it) returns the GW 2 Rev 8