fix homing retraction reference

firmware/src/controller/homing_planner.c

@@ -58,7 +58,7 @@ TM_RAMFUNC bool homing_planner_evaluate()
             if (state.stay_t_current >= config.max_stay_t)
             {
                 // First time the endstop is considered found, reset origins and setpoints
-                frame_user_to_position_sensor_set_offset(observer_pos);
+                frame_user_to_position_sensor_set_offset(position_observer_get_pos_estimate());
                 controller_set_pos_setpoint_user_frame(0);
                 controller_set_vel_setpoint_user_frame(0);
             }

studio/Python/tests/test_nvm.py

@@ -112,6 +112,34 @@ def test_c_parameter_persistence(self):
         self.erase_config()
         time.sleep(0.2)
 
+    def test_c2_homing_parameter_persistence(self):
+        """
+        Test persisting homing parameters across config saves.
+        WARNING: This will perform one NVRAM write and two erase cycles.
+        """
+        self.check_state(0)
+        self.erase_config()
+        time.sleep(0.2)
+
+        self.tm.homing.velocity = 5000
+        self.tm.homing.max_homing_t = 10.0
+        self.tm.homing.retract_dist = 2000
+        self.tm.homing.stall_detect.velocity = 3000
+        self.tm.homing.stall_detect.delta_pos = 500
+        self.tm.homing.stall_detect.t = 2.0
+        self.save_config()
+
+        time.sleep(0.2)
+        self.reset_and_wait()
+        self.assertAlmostEqual(self.tm.homing.velocity, 5000 * tick / s, delta=1 * tick / s)
+        self.assertAlmostEqual(self.tm.homing.max_homing_t, 10.0 * s, delta=0.01 * s)
+        self.assertAlmostEqual(self.tm.homing.retract_dist, 2000 * tick, delta=1 * tick)
+        self.assertAlmostEqual(self.tm.homing.stall_detect.velocity, 3000 * tick / s, delta=1 * tick / s)
+        self.assertAlmostEqual(self.tm.homing.stall_detect.delta_pos, 500 * tick, delta=1 * tick)
+        self.assertAlmostEqual(self.tm.homing.stall_detect.t, 2.0 * s, delta=0.01 * s)
+        self.erase_config()
+        time.sleep(0.2)
+
     def test_d_position_control_w_loaded_config(self):
         """
         Test position control after saving and loading config.