Hello!
We have had a similar report of this problem here. This is being investigated, but as you can see this has been an open issue now for sometime. I have reported that this is still an issue but at the moment I do not know of a fix for this.
Disabling pulseaudio does seem to allow keyboard events to work, but this if you need pulseaudio then this is obviously no help. We will keep you posted.
Regards,
Jon