🩹 Fix Mesh Leveling + Debug compile (#24297)

Marlin/src/core/utility.cpp

         #else
           #if ENABLED(AUTO_BED_LEVELING_UBL)
             SERIAL_ECHOPGM("UBL Adjustment Z");
-            const float rz = bedlevel.get_z_correction(current_position);
           #elif ENABLED(AUTO_BED_LEVELING_BILINEAR)
             SERIAL_ECHOPGM("ABL Adjustment Z");
-            const float rz = bedlevel.get_z_correction(current_position);
           #endif
+          const float rz = bedlevel.get_z_correction(current_position);
           SERIAL_ECHO(ftostr43sign(rz, '+'));
           #if ENABLED(ENABLE_LEVELING_FADE_HEIGHT)
             if (planner.z_fade_height) {
       SERIAL_ECHOPGM("Mesh Bed Leveling");
       if (planner.leveling_active) {
         SERIAL_ECHOLNPGM(" (enabled)");
-        SERIAL_ECHOPGM("MBL Adjustment Z", ftostr43sign(bedlevel.get_z(current_position), '+'));
+        const float z_offset = bedlevel.get_z_offset(),
+                    z_correction = bedlevel.get_z_correction(current_position);
+        SERIAL_ECHOPGM("MBL Adjustment Z", ftostr43sign(z_offset + z_correction, '+'));
         #if ENABLED(ENABLE_LEVELING_FADE_HEIGHT)
           if (planner.z_fade_height) {
             SERIAL_ECHOPGM(" (", ftostr43sign(
-              bedlevel.get_z(current_position, planner.fade_scaling_factor_for_z(current_position.z)), '+'
+              z_offset + z_correction * planner.fade_scaling_factor_for_z(current_position.z), '+'
             ));
             SERIAL_CHAR(')');
           }