Epix Track Mode - Freeze and Reset when paused

When using Garmin Epix in track mode, if I paused the activity and hit resume later, when I try to resume, the watch freezes, then crashes and restarts. After this point, the activity is still there and paused, however when I hit start again, it no longer picks up any distance. The watch only records total time. Only way round this is to end and save activity, then start again