I am half way through a 10k Garmin coach plan and the pace I need to run between has always been visible when I look at the workout. Today it has just disappeared and I can seen no pace for any future runs. 
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We're following up on the report we received that when viewing your workouts in your Connect app that had pace, cadence, or power ranges, the workouts' targets showed as blank or just 0. We're pleased…
We have enough reports of this at this time. The engineering ticket is being worked and I will notify you all with an update when the fix is available. Thank you.
I just updated to Version 4.69.1.5. Seems to have fixed the issue.
Me too
i'm having the same issue - it seems to work on my watch but the most annoying thing is when i do the workout and then save it, it doesn't upload to strava because it logs the workout as being over 100 hours long or something crazy. Anyone else having the same issue?