I'm sure this has been mentioned before, but how can Garmin not put in the ability to see splits when using a training plan.
Here's the response in the FAQ's which is not very good customer service. Does Garmin really want us to have to go to Strava to see the splits?
Why don't I see my lap splits when I'm using a training plan workout?
When you're doing a time-based workout (e.g. Long Run-90 minutes), you will not see lap splits at every mile or kilometer. If those splits are important to you, you can choose not to do the Garmin Connect workout and, instead, do a simple, non-scheduled workout on your device using just the Start/Stop buttons.
Something seems amiss here and it should be a very easy fix for Garmin.