My device couldn’t find the signal of my cadence sensor and kickr afterr I upgradeed the new iOS update!
That sounds like it’s probably more a concern with the iOS update than Zwift, but there are a couple of things you could try.
Please disable Bluetooth on your iPhone and force-reboot it to clear your device cache. After iOS boots up again, re-enable Bluetooth, log into Zwift and try pairing again.
If that doesn’t seem to help, please open a support request with us so we can take a look into your logs a bit.