Don't know why, but I ended up with "Training Status" = "Not Available" and all three "Load Focus" metrics set to zero. I've been using the device regularly for the last year with al least three activities per week. Heat Acclimation dropped from something like 95% to 15%.
Also cannot see the Training Focus on the Garmin Connect Web and Android App.
Something that might be related. About a month ago I bought (and since then I've been using) a garmin instict solar (I know, I shouldn't have).
Any help on this? Please.