I doubt if it’s interference since all his devices went down at once. There are some people, not everyone, but some, who have problems after almost every firmware update.
And with this particular update there were several people who reported zigbee device problems afterwards. Again, not a majority of people, but some.
It’s always infuriating when it happens. it is one of the biggest weaknesses of SmartThings’ architecture that you cannot refuse or delay updates.
Anyone having this problem should definitely report it to support, as the OP has done. But precisely because it isn’t affecting a large percentage of users, it may take some research to figure out what’s going on.
Again, I recognize that it’s infuriating, as it should be. Really the only thing that the OP has done wrong is to claim that a large number of users were affected. That damaged their credibility on this issue, because that part just isn’t true. And leads to too many responses of the “working fine for me” variety.
But it did happen to some people, it is likely related to a failure in the update process, and it is beyond aggravating when it happens.
Unfortunately, for this one as a community we can’t do much more than sympathize. There don’t seem to be any workarounds. You can try the unplug the hub and take out the batteries and leave it off power for 15 minutes approach and see if that resynchronizes everything when it comes back on power, but if it was the update itself that failed partway then it may well require support to do something on their side, and they may just not know what to do yet.
Again, I wish I had an answer, but I don’t. There are other systems out there which do allow you to postpone updates, and which would probably be worth looking at if you want to get out of this kind of forced update architecture. The challenge is finding one that works with zigbee, unfortunately. There aren’t many in the low-cost range except Zipato and vera plus and neither supports the range of devices that smartthings does.
For the OP, I would suggest reframing your posts to something like
I just need to vent. I’m one of the ‘lucky few’ whose zigbee operations got fried by the most recent firmware update and now none of my devices work! Support is looking at it, but for now I’m sitting in the middle of a smart house which has gone completely dumb. So frustrating!
You won’t get any more answers, but I would guess you’ll get a lot more sympathy. These things do happen and they are totally annoying when they do.