Turn on recovery as collisions only for floor snapping as this leads to unwanted behaviour for other surface than the floor.

scene/2d/physics_body_2d.cpp

@@ -1144,7 +1144,6 @@ bool CharacterBody2D::move_and_slide() {
 
 	if (!current_platform_velocity.is_zero_approx()) {
 		PhysicsServer2D::MotionParameters parameters(get_global_transform(), current_platform_velocity * delta, margin);
-		parameters.recovery_as_collision = true; // Also report collisions generated only from recovery.
 		parameters.exclude_bodies.insert(platform_rid);
 		if (platform_object_id.is_valid()) {
 			parameters.exclude_objects.insert(platform_object_id);
@@ -1203,7 +1202,6 @@ void CharacterBody2D::_move_and_slide_grounded(double p_delta, bool p_was_on_flo
 
 	for (int iteration = 0; iteration < max_slides; ++iteration) {
 		PhysicsServer2D::MotionParameters parameters(get_global_transform(), motion, margin);
-		parameters.recovery_as_collision = true; // Also report collisions generated only from recovery.
 
 		Vector2 prev_position = parameters.from.columns[2];
 
@@ -1360,7 +1358,6 @@ void CharacterBody2D::_move_and_slide_floating(double p_delta) {
 	bool first_slide = true;
 	for (int iteration = 0; iteration < max_slides; ++iteration) {
 		PhysicsServer2D::MotionParameters parameters(get_global_transform(), motion, margin);
-		parameters.recovery_as_collision = true; // Also report collisions generated only from recovery.
 
 		PhysicsServer2D::MotionResult result;
 		bool collided = move_and_collide(parameters, result, false, false);
@@ -1407,7 +1404,7 @@ void CharacterBody2D::_snap_on_floor(bool p_was_on_floor, bool p_vel_dir_facing_
 	real_t length = MAX(floor_snap_length, margin);
 
 	PhysicsServer2D::MotionParameters parameters(get_global_transform(), -up_direction * length, margin);
-	parameters.recovery_as_collision = true; // Also report collisions generated only from recovery.
+	parameters.recovery_as_collision = true; // Report margin recovery as collision to improve floor detection.
 	parameters.collide_separation_ray = true;
 
 	PhysicsServer2D::MotionResult result;
@@ -1443,7 +1440,7 @@ bool CharacterBody2D::_on_floor_if_snapped(bool p_was_on_floor, bool p_vel_dir_f
 	real_t length = MAX(floor_snap_length, margin);
 
 	PhysicsServer2D::MotionParameters parameters(get_global_transform(), -up_direction * length, margin);
-	parameters.recovery_as_collision = true; // Also report collisions generated only from recovery.
+	parameters.recovery_as_collision = true; // Report margin recovery as collision to improve floor detection.
 	parameters.collide_separation_ray = true;
 
 	PhysicsServer2D::MotionResult result;

scene/3d/physics_body_3d.cpp

@@ -1210,7 +1210,6 @@ bool CharacterBody3D::move_and_slide() {
 
 	if (!current_platform_velocity.is_zero_approx()) {
 		PhysicsServer3D::MotionParameters parameters(get_global_transform(), current_platform_velocity * delta, margin);
-		parameters.recovery_as_collision = true; // Also report collisions generated only from recovery.
 
 		parameters.exclude_bodies.insert(platform_rid);
 		if (platform_object_id.is_valid()) {
@@ -1275,7 +1274,6 @@ void CharacterBody3D::_move_and_slide_grounded(double p_delta, bool p_was_on_flo
 	for (int iteration = 0; iteration < max_slides; ++iteration) {
 		PhysicsServer3D::MotionParameters parameters(get_global_transform(), motion, margin);
 		parameters.max_collisions = 4;
-		parameters.recovery_as_collision = true; // Also report collisions generated only from recovery.
 
 		PhysicsServer3D::MotionResult result;
 		bool collided = move_and_collide(parameters, result, false, !sliding_enabled);
@@ -1520,7 +1518,6 @@ void CharacterBody3D::_move_and_slide_floating(double p_delta) {
 	bool first_slide = true;
 	for (int iteration = 0; iteration < max_slides; ++iteration) {
 		PhysicsServer3D::MotionParameters parameters(get_global_transform(), motion, margin);
-		parameters.recovery_as_collision = true; // Also report collisions generated only from recovery.
 
 		PhysicsServer3D::MotionResult result;
 		bool collided = move_and_collide(parameters, result, false, false);
@@ -1575,7 +1572,7 @@ void CharacterBody3D::_snap_on_floor(bool p_was_on_floor, bool p_vel_dir_facing_
 
 	PhysicsServer3D::MotionParameters parameters(get_global_transform(), -up_direction * length, margin);
 	parameters.max_collisions = 4;
-	parameters.recovery_as_collision = true; // Also report collisions generated only from recovery.
+	parameters.recovery_as_collision = true; // Report margin recovery as collision to improve floor detection.
 	parameters.collide_separation_ray = true;
 
 	PhysicsServer3D::MotionResult result;
@@ -1611,7 +1608,7 @@ bool CharacterBody3D::_on_floor_if_snapped(bool p_was_on_floor, bool p_vel_dir_f
 
 	PhysicsServer3D::MotionParameters parameters(get_global_transform(), -up_direction * length, margin);
 	parameters.max_collisions = 4;
-	parameters.recovery_as_collision = true; // Also report collisions generated only from recovery.
+	parameters.recovery_as_collision = true; // Report margin recovery as collision to improve floor detection.
 	parameters.collide_separation_ray = true;
 
 	PhysicsServer3D::MotionResult result;

servers/physics_server_2d.h

@@ -490,7 +490,7 @@ public:
 		bool collide_separation_ray = false;
 		HashSet<RID> exclude_bodies;
 		HashSet<ObjectID> exclude_objects;
-		bool recovery_as_collision = false;
+		bool recovery_as_collision = false; // Don't report margin recovery as collision by default, only used for floor snapping.
 
 		MotionParameters() {}
 

servers/physics_server_3d.h

@@ -527,7 +527,7 @@ public:
 		bool collide_separation_ray = false;
 		HashSet<RID> exclude_bodies;
 		HashSet<ObjectID> exclude_objects;
-		bool recovery_as_collision = false;
+		bool recovery_as_collision = false; // Don't report margin recovery as collision by default, only used for floor snapping.
 
 		MotionParameters() {}