yes, write to the Garmin Support directly and they will tell you the way how to downgrade manually the firmware via Tacx Training app (probably they will provide you the old firmware file also)
The issue with huge cadence spikes has been mostly resolved by the 2.7 update but not completely. Cadence jumps about when power drops from high to about 100 watts. I think a further update is required
I requested a firmware downgrade link through support and, following numerous unproductive inquiries, received a non-functional link. My subsequent reply to the email resulted in another series of questions. The current state of this software suggests that the link should be publicly accessible.
