Z-Wave Freezing on hub

I am struggling with my entire z-wave network becoming unresponsive, only to be resolved by a reboot. This can happen 3 times in a week, or once every 2 weeks. I cannot find a pattern. I will detail what I've done below to troubleshoot, but I am at my wit's end. I've gone so far as to upgrade my hub from a c7 to a c8, and the same thing is happening, so something is absolutely wrong on my end.
Running C8. I have approximately 65 z-wave devices on my network (in addition to probably 20 zigbee, konnected board, and links to several other systems - caseta, hue, sonos, google home, govee, lifx, myq, etc.) So my system is pretty elaborate.

I've noticed no pattern to when it freezes. Examples:
+Last night I pulled into the garage around 3pm and noticed the lights didn't turn themselves on, noticed no z-wave devices were working
+This morning, I noticed fence lights in back yard were still on after sunrise, this led me to notice that again, all z-wave devices frozen

Nothing abnormal is in the logs (no errors or warnings) and I see no "running jobs". I have no ghost devices (I bought a stick and went thru removing them all back in November while trying to troubleshoot this). I see no hanging rules or devices; if I sort my z-wave devices by "last message" date, all seem to be being used frequently (no unused devices). Been using this system for about 5 years, and I know everyone will say "what did you change?" Well, TBH, I change stuff so often I can't answer that as I don't really know when this began.

If you were faced with this problem, how would you troubleshoot?

I went down that road myself. Zwave would just stop working, and nothing was seen in the logs.

I had two zwave dimmer switches that would occasionally stop on their own, and I would air gap them to get them connected again, and I was just living with that.

Then I did a cloud migration of my Zwave devices to a new hub, and I started getting complete Zwave lockups. In the end, it was those two switches (Eva Logik) that somehow got worse after the migration, and they were killing the whole network. I'm not sure why a cloud migration made the issue worse.

Removing and replacing those two switches fixed everything for me since.

If you have any single devices that have in the past acted strange or disconnected, I would be suspect of them.

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I'm sure experts will chime in, but here's my take.

It's like you have to channel Sherlock Holmes.

It's not easy.

Probably just one of you 65 z-wave devices is screwing up and you have to find which one.

Are you looking for something that might be kicking out a lot of messages, maybe clogging things up?

Older GE/Jasco switches have been known to bring the mesh to its knees. There were several threads on these lately.

Maybe try to do search here on misbehaving z-wave sensors.

I don't know if you can say definitively it is not likely a battery device.....maybe.

I don't know what else, except to disconnect them, take scrupulous notes. The long lead time for it to f up again is a big hindrance.

Disconnect wall switches...yeah that'll be fun. If you could live without a circuit, if you have to wait 2 weeks? Ugh.

Some paddle switches have an air gap on the switch but I understand even that might not be definitive, (vs flipping the breaker or disconnecting a wire).

I don't think "disabling" a switch in the Hubitat interface will be good enough, because the radio is still doing its thing.

How about instead of just a reboot, you do a shutdown, unplug power, wait for 30 seconds, and then replug? That's my go to move, lol, and resets radio.

Perhaps others with more experience and knowledge will chime in.

I'm been moving to z-wave lr. No mesh, lol.

edit: How about providing an inventory of your Z-Wave devices?
edit2: Hub firmware version?

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Thanks for the replies.
I agree it's unlikely to be a battery device causing the issue. I also agree it's a PITA in the troubleshoot becuase of exactly why you said - not feasible to uninstall each individual device, or leave a circuit off, etc.
All of my devices are LR except for 5. I switch, and 4 open/close sensors.
I haven't noticed any switches behaving oddly individually, so that is a hinderance.
I have an unhealthy (ha) mix of Zooz, GE, and Homeseer. I'm slowly moving away from the GE & Homeseers in favor of Zooz whenever I have a problem, but so far, nothing has been obvious.

Is there an easy way you know of to export a list of all z wave devices? I'm struggling to figure that out.

They're paired as LR?

I believe so. I use Simplicity Studio to help me remove ghost devices and in there is a column for LR for some devices. Maybe I'm interpreting it wrong, but I am assuming a red X means it is not. Though it is bizarre that there is no check mark for the others. Side note, I was wrong, I have 7 non-LR:

I'm not positive that's definitive.
I'd say the Hubitat device list would be better.

They like pictures here, so I'd say take multiple screen shots.

In Z-wave details you could do a sort on node and the smallest ones, ie, non-lr, would pop up first. For example:











huh, none of mine say LR on them, maybe I have 0 LR :smiley:

That'll make things easier. Just kidding.

The list is still good.
People can look at it and suggest likely suspects, hopefully.

True - none of them are currently paired as LR. Did you use SmartStart to pair?

Not a huge deal -- at first glance, I'm not seeing any obvious ghosts, so your mesh should be in good shape overall.

I'm assuming these screenshots were taken after a recent reboot? That would explain why some devices don't have routing or message information yet.

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Correct on reboot timing. I've never heard of SmartStart. I just pair by going to the add devices page and put in inclusion mode.

What are the vintages of all your Jasco switches?
Not sure-does the driver have an id on it, maybe a model #.

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Nothing wrong with that pairing method, but if you want to pair a device as LR, that requires using SmartStart.

Link below goes to the applicable section in the Documentation

https://docs2.hubitat.com/en/compliance-docs/zwave-manual#z-wave-plus-smartstart-devices-on-the-network

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This is an example of a Zooz of mine.
This is all in lieu of poking around in the electrical box, lol.

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Good call about the Jasco switches -- those may very well be the fly in the ointment here

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Not definitive. Don't all those switches, even the new ones, say "Jasco Products"?

The Jascos don't have great details for me:







I realize this doens't show the versions and such, my zooz devices show those details, but not my jascos