I completed a "Structured Workout" running today with my 945 LTE using the on-device options to setup the workout. It included warmup and cooldown, and was a fairly basic 4x 7 minutes with 3 minutes rest.
Upon completing I happened to be looking at the summary on my iOS Connect app I edited the Activity Name (within App) and noticed my Stryd data fields and plots were not showing. I checked and the workout seems to indicate the Stryd Zones Data Field was used, but.... no data shown in the iOS app for the IQ fields.
I checked on my PC with Chrome (web view) and see Connect IQ fields there fine, so it seems related to the iOS app itself.
Upon leaving the activity in the iOS app (back to "News Feed" for example) and re-visiting the activity the fields are shown. It seems that editing the activity name and saving that (within the app) returns you to a view that fails to show IQ fields.