Error message: The selected output device is not available

Every now and there is the error message

“The selected output device is not available
Please connect HifiBerry DAC Plus to the unit or select a different output device from playback options”

as reported here: https://forum.volumio.org/please-access-version-587-2019-t12696.html#p65261

Sound is working nonetheless. My DAC is an original Hifiberry DAC Plus on a Raspberry Pi 3B. Volumio version is 2.599 (fresh install). The error message seems to appear after booting, but as it happens unpredictably I have not been able to capture a log so far.

Issue reported on GitHub: https://github.com/volumio/Volumio2/issues/1788