That actually happened to me, I had no idea there was a problem for the first 20km of my ride.
That said, running CycleOps H2/Apple TV. Apple TV says it’s up-to-date with a fix for this issue but still having the problem.
This has been driving me crazy. I’ve been trying everything…still no updates for IOS/iPad. Using a Magnus/iPad set up. Everything up to date and calibrated.
Same thing on my side. I can ride for 2.5km then my wheel start spinning on it’s own and then I loose connexion to rpm and control. If I try to join a event, it start to go wrong as soon as It starts.
Tacx Genius, IPhone XS, Apple Watch = issue
Tacx Genius, PC, IPhone XS companion, Apple Watch = issue
Tacx Genius, PC beta Bluetooth, companion, Apple Watch = issue
And in classic Zwift fashion, i get on my bike tonight to spin and resistance is working. I did nothing.
Apple TV and Magnus trainer.
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I am not sure if the AppleTV/iOS problem is fixed, but I downloaded the app for my MacBook, connected via the companion app on my iPhone (with Bluetooth) and it worked with no hiccups. So if you have the ability, maybe try it that way.
Update: From the other forums, it looks like the AppleTV update went live yesterday and the iOS update is awaiting Apple’s approval, seems like it’s all close now
Same issues here. I use the wahoo kickr snap and still no updates. it has been a week and a half…
Same problem. iPad Pro and Elite Rampa. ERG mode not working in training and no resistance on hills. Fingers crossed this gets fixed pronto.
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I was running a Kickr 18 on Win 10 computer without issue. Had to replace Kickr, and setup new Kickr yesterday. Now its having a resistance issue (haven’t tried erg yet) in that it doesn’t seem to respond to terrain. On flats it feels like quicksand. Power seems off as well. Did a number of spin downs, no effect. Hoping it is a Zwift issue and not a problem with my new replacement Kickr!
Having the same issue. Have submitted a ticked. Hope you all put in tickets. Don’t count on them looking here.
IOS(fully updated)
Hammer(updated and calibrated)
Zwift(fully updated)
The new iOS update version 35413 has been released, if you have been experiencing resistance issues on iOS devices please go update to the newest version and see if the issues persist. For anyone having these issues on other devices or after updating to the newest version, please open up a support ticket here.
Thank God the update has been released. Let’s hope this annoyance is rectified.
The update solved my issue - Kickr Gen. 1, iPad Pro, erg mode didn’t work with TrainingPeaks custom workout - now it does again! Thanks!
I’m having the same problem with my cycleops hammer with the latest update on my iPad Pro. I went to Rouvy and my trainer works perfect. It’s really frustrating to not be able to participate in Zwift events right now. BTW the trainer won’t calibrate at all, just keeps failing.
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Try pulling down on that screen to make sure it actually refreshes. When I just opened the App Store app it showed the same thing your did until I made it refresh itself and then the update showed up.
Click on Zwift in the App Store (that is, on the app name rather than the ‘open’ button), and that should trigger an explicit update check when it opens the app page. Otherwise, you’re at the mercy of App Store’s whims.
After the update and rode few km my elite rampa seems working fine, hope it will continue. Finger crossed!
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Happy to report back it’s now working and their support team got back to me right away 
Got a new iMac and set it up to connect with BLE instead of Ant+ as I thought it is more convient. Did a group ride and had no resistence from my Tacx Neo. Had to switch back to Ant+.
Latest Zwift version is installed. Thought this issue is resolved?
It’s not only the Mac platform that has issues - i’m on PC windows 10 and yesterday ran out of gears at 100RPM trying to generate enough watts to complete a workout. It looks like the PC platform is infected with this issue too.
EIther that or i’ve just become the latest super cyclist.