I have had my watch4 from first time it came onto market it has always auto come counting my steps when out walking etc just recently it's stopped auto detection my fitness activity
Every thing on the watch is turned on to allow this to happen
Anyone with ideas as to why this happening and a fix would be good
Have you giving the watch a reboot recently. Holding both side buttons in together until the watch turns off itself. Sometimes just a reboot can help with issues. You can also wipe cache partition. https://youtu.be/n7cNwgd8GIQ