No blame explicit or implied....
But it still drives me nuts. I spent a couple hours today un-screwing random things that don't work anymore. Comes with the territory of overly complicated integration of random stuff. Echo stopped working (it was an old bespoke driver before C4 had a driver), IFTTT routine stops working (weather no longer provided, teams no longer pushing scores...), one of the outlet dimmer hw fails, kindle pushed an update, now C4 pushed an update, and....
The more you do with the system, the more often it breaks. I'm sure in the next year or so AI will fix everything automatically!
(Though I just reread your post... I mean, C4 definitely had a bug, and definitely fixed it. I had reloaded everything multiple times. Couple weeks go by and it magically fixed itself. Pretty much the only thing that could have happened was C4 or kindle pushing an update.)