My Alexa integration also is not working today but I assume it is just an outage. I have learned to wait 24 hours before making changes as they usually restore the C4 integration.
As far as the other glitches you describe where it says it is having trouble but then does what you say, I have also experienced that intermittently with no real rhyme or reason. In general, I would say the Alexa integration works about 99% of the time. When it is t working, I use Siri with Homebridge integration. Mainly for global commands like “Siri, goodnight” - all lights go off, doors lock, gates close and home alarm sets, etc.
Hopefully the Alexa integration returns soon!