Plane: Quadplane disable forward motor assist in Q modes if rangefinder is out of range low

ArduPlane/quadplane.cpp

@@ -3209,8 +3209,9 @@ int8_t QuadPlane::forward_throttle_pct()
         // lidar could cause the aircraft not to be able to
         // approach the landing point when landing below the takeoff point
         vel_forward.last_pct = vel_forward.integrator;
-    } else if (in_vtol_land_final() && motors->limit.throttle_lower) {
-        // we're in the settling phase of landing, disable fwd motor
+    } else if ((in_vtol_land_final() && motors->limit.throttle_lower) ||
+              (plane.g.rangefinder_landing && (plane.rangefinder.status_orient(ROTATION_PITCH_270) == RangeFinder::Status::OutOfRangeLow))) {
+        // we're in the settling phase of landing or using a rangefinder that is out of range low, disable fwd motor
         vel_forward.last_pct = 0;
         vel_forward.integrator = 0;
     } else {