Had a quick test of the new app yesterday, everything seemed to work ok and the scrolling the screen is excellent. One thing that did happen afterwards (only on the AW4 my wife has), is the iPhone WorkOutDoors app did not show the workout that had been saved. It was showing up ok in Apples Activity app as a WorkOutDoors workout, just not in the WorkOutDoors app itself.
Mine was fine, showed up in all the right places. Might just be a one off!
I have seen that happen before when there was a problem with the installation of the watch app. The best thing to try is to uninstall the watch app (not the iPhone app), reboot both devices and then reinstall the watch app.
Sorry about that. Occasionally iOS and watchOS seem to have problems communicating, but it is usually fixed by reinstalling the watch app.