After 6.0 FW upgrade I get absurd stats after training with Fenix 5 Plus, Zwift and Tacx Neo, e.g. 60000 W max power or w/kg FTP of 1125 W. The W numbers during training look OK, though.
Seems to be FW bug! never had this behaviour before...
Anyone know If this has been logged with Garmin?
Just spoke to Garmin support. Was advised this is a known issue and is set to be rectified with the new public update. Currently not available - no date offered but the beta is available at https://www8.garmin.com/support/download_details.jsp?id=14335 and from the comment above, this appears to have fixed the issue for some.
Funny that. I've been going back and forth with Garmin Support about this for 3 months.
I've now had to escalate to Fair Trading. Appalling behaviour from Garmin, who treat their customers with complete and utter contempt.