Garmin Coach benchmark run not completing

Is Garmin Coach 100% compatible with the Instinct 2? Reason I ask is I’ve carried out a coach training plan previously with an old Forerunner.

I looked to do the half marathon plan with the Instinct 2 and I noticed the coach didn’t appear in the glances screen like it used to.

I started the run app and I was prompted to carry out the first benchmark workout, the watch guided me through the workout, ended it, saved and synced to Garmin connect. Now I can see it in the app but the actual benchmark run is not showing as complete…

I’ve tried rescheduling the workout to a different day and back again as I read to try that as a possible fix. I’ve also changed the run to “training” instead of “uncategorised” but still no joy.