I’ve noticed a similar problem, which I thought might be related to another issue, posted here.
Essentially my tests suggest that there are certain phrases which LastVoiceCommand no longer reports, whereas previously it report every single phrase heard by the echo device. LastVoiceCommand does not get updated if phrases contain the names of smarthome items (I noticed it with lights, blinds, thermostats). Presumably this is also true of the news briefing you have set up. It doesn’t appear that the devices even need to exist in the openHAB or Alexa systems (for example, I don’t have blinds, and any phrase asking to control blinds does not update LastVoiceCommand. But ‘Alexa, volume up’, ‘what’s the time’ or even random phrases like ‘you’re beautiful’ will all get reported just fine! It’s very strange behaviour.
I’m running on openHABian on a RPi4, and was on 2.5.6 when this problem started a couple of days ago. I’ve since updated to the latest stable release 2.5.7 and tried various snapshots of the 2.5.7 EchoControl binding, but the problem remains.
I wonder if this is a security feature introduced by Amazon server-side. Whatever it is, it has broken some crucial elements of my smart home, so it would be good to hear whether others are having the same problem.