error with mycroft.volume.get (only works the first time after boot)

[juwe9500]

Asking for the current volume or using "quieter" or "louder" only works for the first time after a re-boot.

quieter
>>> Volume set to 40 percent
louder
>>> There seems to be a problem. I could not query the current volume.
>>> An error occurred while processing a request in Volume Skill
quieter
>>> There seems to be a problem. I could not query the current volume.
>>> An error occurred while processing a request in Volume Skill