I have a Fenix 6S Solar and I completed Garmin's 'Lactate Threshold Guided Test' on 11 June. I accepted the new lactate threshold detected during the run but, when I synced the watch to the 'phone, the lactate threshold was not updated in either the mobile (android) or web version of Garmin Connect. Interestingly, Garmin Connect also seemed to think that the run was a Functional Threshold Power test, rather than a Lactate Threshold Test??
And again, after a run this morning (which was not a guided lactate threshold test), I accepted the new lactate threshold detected but, the lactate threshold was not updated in either the mobile or web version of Garmin Connect after syncing.
My watch is on software version 26.00 (c7a16d5) and doesn't show any available update.
I know there was a similar issue with the Forerunner series, but I haven't seen a similar issue for the Fenix series.
Any help is appreciated.