Sorry that didn’t fix it Mirko
Thanks, at least the new Hub is now on its way to me and overall a couple of days is still ok, though it’s not necessary to run through all support steps (do a Spin Down with missing power/speed numbers???) when a very detailed description is already available. So I just hope the next one will be a permanent fix 
After 2 weeks, I received my new Hub. Hopefully, I got one of the good ones. I really do love it, as long as it works as it should.
If you’re having a similar problem, my advice is to just continue to stay in communication with the support team (email) and they’ll get you squared away.
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2 weeks is a long time.
I just started the process with the support team, now that it is a known problem I hope they will process the request more quickly
have fun with your new zwift hub
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In fairness to Zwift, my troubleshooting and shipping were over the Christmas and New Year time with a UPS delay too, so hopefully a week faster for you Cedric.
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My new Hub worked great for one ride, then 10 minutes into my next ride two days later the same thing happened. It connects to two different laptops and three different bike computers just fine, it just doesn’t transmit speed, cadence, or power data. I’ve opened a ticket with Zwift but I’m not feeling very confident 
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Zwift (through Chat who were extremely responsive and helpful!) determined it’s the Hub. They have a replacement being shipped out. I’m hoping the first unit was an early high-volume production run gremlin (I’m sure Jet Black who makes the Hub for Zwift needed to adjust the production scale on an order of magnitude to meet demand) … or it was just built on a Friday 
I’ll update how it goes with the replacement … 
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@KevSp How’s your replacement unit been working, did it solve the issue? I have a replacement unit coming for the same symptoms and I’m hoping it was a ramp-up production issue with the first units
@KevSp & @Dave_Morgan1 , I’ve been using my replacement unit for a week now and its working great! I hope you have the same experience!!
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Hi, I’m having the same issues. Zwift has a replacement Hub coming in the next few days. My question is how’s your replacement holding up? I’m hoping only the 1st large production run had issues (my/our unit/s) and the replacements are reliable
Hi Dave, so far no issues and hoping for the best. In the end, I still have guarantee on the unit. Good luck with yours as well!
Hi Dave
Looks like I’m the next on line with no power cadence issues. Did your new hub arrive? Better luck this time? Thanks. I have a support ticket out but a fancy paperweight until then.
Same problem… Did work when purchased albeit VERY flakey a lot of the time and often missed rides because of flakey connections but now … nothing at all - 0 watts/cadence etc. although HRM picks up fine. Still waiting for comeback from Zwift but so far its proved to be a very disappointing experience and a waste of money largely.
OK, so - update. Zwift have been helpful and responsive. After a few ‘abortive’ type questions (i.e. it needs a new cable - doh!) over three exchanges they quickly resolved to send a new hub. Waiting to receive that now, having returned the old hub, and looking forward to seeing what happens. Strangely, I realised the hub stopped working after I installed the firmware update as instructed.They seemed to think I had discovered something important/new but I think I have seen other comments on this thread alluding to the same thing. My husband hasn’t updated his firmware (we bought two hubs at the same time). Now nervous to do so!
Further update … New hub received. Firmware updated successfully and all working fine again. Zwift were really good in the end at resolving the problem. Can’t say anything bad about their service.
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Same problem with a device I’ve had less than 2 months (but more than one), but lousy response from support. Runaround.
I regret the purchase, and regret it happened JUST outside the 30 day return window. I’d get my money back and buy something that isn’t a piece of junk if I could.
Did anyone get a refund or extension on their subscription while they waited for the new unit? It’s not much, but I feel cheated paying for subscription to a service that I can’t use because the provider’s hardware makes it impossible to use.
Thanks for the post to help me troubleshoot as I wait for Zwift customer service to email me after message support gave up. Have the same issues as the original poster and surprised they haven’t fixed this problem a year later.
Now I’m just hoping I can forward this thread to the rep and start the replacement process. Not how I expected to start my 7 day+1 year free trial
Sorry you’re having the problem Curt. Hang in there. I’ve had my replacement for many months now w/o issue. I will say, I no longer leave The Hub plugged in to the wall. I run it thru a surge protector and keep the power strip off when not in use. I don’t know if that matters, but can’t hurt.