My Galaxy S10 screen randomly wakes up inside pocket or bag

[Q : My Galaxy S10 screen randomly wakes up inside pocket or bag. Why is this?]

A: In case Lift to wake or Double tap to wake up feature is activated on your device, screen may be turned on when conditions are satisfied.
Please check these motion and gesture are enabled or not in following paths : Settings > Advanced features > Motions and gestures > Lift to wake or Double tap to wake up
 

ㆍLift to wake : Set the device to turn on the screen when you pick it up
ㆍDouble tap to wake up : Set the device to turn on the screen by double-tapping anywhere on the screen while the screen is turned off