CT10 Sensors and chipping with an 8 iron

To prevent any chip shot, half-shot, or rescue shot distances from recording on clubs with CT-10 sensors attached to them, you would have to edit and remove the club associated with the shot on the scorecard uploaded after the round has ended. 

If a shot is taken from a club with no CT-10 sensor attached, and the club prompt feature is being used...simply tap the BACK button to skip selecting a club to avoid shot from affecting the average and max distances. 

See related Garmin Support content below: 

• Editing AutoShot Information With the Garmin Golf App