Oh, OK.
Even though they're useless at this time I am not yet ready to get rid of them.
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LOL!
Problem solved. Those little guys are damn cute, you're lucky I don't know where you live or you'd have to keep all doors and windows locked. 
I have one to deep restart the hub with the problematic Z-wave network (I gave up on trying to fix it), but it's Wi-Fi and not controlled by Hubitat (as it itself controls Hubitat, lol), so I am familiar with the bunch.
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Okay, something weird is going on. While setting up the plugs, I flashed one of the sensors too much, and it got reset. No problem, I thought. I put it in pairing mode and tried to rediscover it, but it won't pair again!
- It still pairs just fine with the Tuya hub
- Another brand-new sensor from a box pairs just fine with the Tuya hub but won't pair with Hubitat! What is going on?!
- I tried Zigbee radio restart, hub restart, and hub deep reboot – no luck
- I tried pairing without repeaters standing near the hub – no luck
Am I losing my mind? Too many ZigBee devices? Is there even a limit?!
Long time ago when PC era just started many "smart" companies (Compaq to name one) was trying to be a very inique in order to glue customers to their product lines. Of course over long time this did not work. I wonder if Tuya is trying the same thing (i.e. making products wich will work only with Tuya ecosystem). If this is a case eve it will fail.
Apologies, but above wording did give me a laugh for a moment... 
But weird that it won't pair. I haven't paired one in a while, but I don't remember them giving me problems. Maybe pull power on the Linptech for a minute and then plug it in again, and do the hub shutdown/30s dance while that's happeing and try the pairing again.
This on a C8, right?
I am thinking maybe all the new plugs connected directly to the hub and exhausted the 32 directly connected devices limit. I'll give them time to get settled on the repeaters, opening up the hub for more devices. Will report tomorrow.
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Have you tried removing it from the Tuya hub (instead of manually resetting) while simultaneously starting pairing on HE? If that doesn’t work, you could use the Zigbee Map apps feature that lets you select the repeater to pair it with the hub.
You don't actually need 32 different physical devices, but just one Zigbee 3,0 repeater (router) that changes its 16-bit PID on every pairing attempt. So, after making 32 pairing attempts, the game is over.... This is where the Double Luck Voodoo comes into play.
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How are you all powering your Linptech sensors? I have two that I’ve never had to turn on or off. They e been hooked up for months now. I power them over POE from a POE switch.
Mine have were initially powered by various USB power blocks/bricks, all 1A or higher. Changing Linptech's power source to plugs directly connected to wall outlets didn't improve reliability. So for me, regardless of power source, one or two of the six I have has eventually gone bye-bye after a month or three.
I'm sure you've told me that before, but good to get that reminder.
Any chance that the Linptech driver can be enhanced w/a new command to force the device to "reset" so that power cycling isn't required?
I’m still on the C7 hub with zigbee being on its own hub. C7 vs C8 make any difference?
I had them on C8 initially, and they didn't play nicely w/some Aqara contact sensors on that hub, tried two times and having the Linptech on the C8 resulted in the Aqara quickly falling off the C8 each time. Moved all my Linptechs to my C7 and they haven't caused any problems w/Aqara contacts on my C7. 
C8 has all my Z-Wave and Matter, and about 1/2 my Zigbee (60-ish). C7 has only Zigbee, about another 60-70-ish).
I have 3 Linptech sensors on a C-8 with a bunch of Sylvania can lights and led strips, plus some GE in-wall dimmers, and they haven’t caused any issues. There aren’t any end devices on that hub except for 2 Lutron Aurora rotary dimmers.
Yup...YMMV rears it's head again. 
I don't think I've heard of anyone else having a similar issue.
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Thanks for the testing.. I really appreciate it. My next experiment is to build my own devices. micro resin sealed 120v to 5V power supplies ($6) , driving an ESP8266 module ($1.50) which controlling an LD2410S 24GHZ sensor ($3.50) and controlling the power to it via a MOSFET ($0.40). I'm thinking about tapping into mains power with the micro 5V PS in the wall boxes power the light switches. Then creating a gap between the drywall and one side of the wall boxes to mount the 24GHZ sensor behind the drywall. The ESP8266 will read the 24GHZ sensors via Tasmota (driver already exists) and cycle power daily via the built in timer/scheduler. External control and reporting will be via MQTT. $12 buck project.
Damn...that sounds like some fun. Very interested to see how it comes out when you're done.
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I use tiny USB Male to Female ESP8266 devices. About $5 a piece. I re-flashed them with Tasmota and put in a rule inside them to cycle the female side power output daily at 4am. No external control from any hub required. All the recycling events are being generated internally via the Tasmota firmware.
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