Yes, it only works with 25 devices. There’s a bug in the Particle API node where the url is ignored on the 2nd and subsequent uses, so I can’t actually iterate all of the device yet. But once that’s fixed I’ll release a new version that handles pagination.
Yes, it does return after the first failure. I originally wanted it to return the array of failed results in one call but it didn’t work right. Eventually you’ll get all of the notifications, it will just take a number of calls.