A bug I came across tonight.
If you execute a workout (at least from Daily Suggestion) without starting an activity first (e.g. you go into the main race glance > Daily Suggestion > Do Workout), the Stryd data field will not be loaded into a data screen (instead showing the "IQ..." icon), so no Stryd data is recorded. I don't know if other ConnectIQ fields are affected.
I'm using FW 14.17