I send a workout to my garmin library then use my edge 530 to run the workout with my tacx flow. Its has been 50/50 whether the whole workout works or not.
Ill ride and the trainer adjusts resistance to make sure I match target power. About 20 minutes into a workout it will just completely stop controlling the trainer…
Usually it stops after a step change.
This never happens with trainer road or with a workout created directly in garmin.