I have this exact issue - it worked fine last time I rode indoors (14th September), but after updating today to 1.17.1 (81847) no resistance changes on my Kickr Core, or incline changes on my Climb. Sepnt an hour trying to change settings, pairing/unpairing, doing spin downs, with no luck at all.
The connection via BT was very unstable too, and when reconnecting, it often didn’t pick up the Cadence sensor.
Windows 10 laptop, BT connection, Kick Core & Climb
All now definitely up to date
Not cool