diff --git a/Marlin/src/gcode/bedlevel/abl/G29.cpp b/Marlin/src/gcode/bedlevel/abl/G29.cpp
index 8a30f3d95..0cb57ea0b 100644
--- a/Marlin/src/gcode/bedlevel/abl/G29.cpp
+++ b/Marlin/src/gcode/bedlevel/abl/G29.cpp
@@ -630,6 +630,8 @@ void GcodeSuite::G29() {
 
       bool zig = PR_OUTER_END & 1;  // Always end at RIGHT and BACK_PROBE_BED_POSITION
 
+      measured_z = 0;
+
       // Outer loop is Y with PROBE_Y_FIRST disabled
       for (uint8_t PR_OUTER_VAR = 0; PR_OUTER_VAR < PR_OUTER_END && !isnan(measured_z); PR_OUTER_VAR++) {
 
diff --git a/Marlin/src/gcode/host/M118.cpp b/Marlin/src/gcode/host/M118.cpp
index 30a41876f..63e195ae6 100644
--- a/Marlin/src/gcode/host/M118.cpp
+++ b/Marlin/src/gcode/host/M118.cpp
@@ -25,8 +25,8 @@
 /**
  * M118: Display a message in the host console.
  *
- *  A  Append '// ' for an action command, as in OctoPrint
- *  E  Have the host 'echo:' the text
+ *  A1  Append '// ' for an action command, as in OctoPrint
+ *  E1  Have the host 'echo:' the text
  */
 void GcodeSuite::M118() {
   if (parser.boolval('E')) SERIAL_ECHO_START();
diff --git a/Marlin/src/gcode/motion/G2_G3.cpp b/Marlin/src/gcode/motion/G2_G3.cpp
index 88cd8a83e..a805c710f 100644
--- a/Marlin/src/gcode/motion/G2_G3.cpp
+++ b/Marlin/src/gcode/motion/G2_G3.cpp
@@ -51,6 +51,7 @@ void plan_arc(
   #if ENABLED(CNC_WORKSPACE_PLANES)
     AxisEnum p_axis, q_axis, l_axis;
     switch (gcode.workspace_plane) {
+      default:
       case GcodeSuite::PLANE_XY: p_axis = X_AXIS; q_axis = Y_AXIS; l_axis = Z_AXIS; break;
       case GcodeSuite::PLANE_ZX: p_axis = Z_AXIS; q_axis = X_AXIS; l_axis = Y_AXIS; break;
       case GcodeSuite::PLANE_YZ: p_axis = Y_AXIS; q_axis = Z_AXIS; l_axis = X_AXIS; break;
diff --git a/Marlin/src/gcode/parser.cpp b/Marlin/src/gcode/parser.cpp
index 06dd8ffbd..b71856b0a 100644
--- a/Marlin/src/gcode/parser.cpp
+++ b/Marlin/src/gcode/parser.cpp
@@ -155,7 +155,7 @@ void GCodeParser::parse(char *p) {
   #endif
 
   // Only use string_arg for these M codes
-  if (letter == 'M') switch (codenum) { case 23: case 28: case 30: case 117: case 118: case 928: string_arg = p; return; default: break; }
+  if (letter == 'M') switch (codenum) { case 23: case 28: case 30: case 117: case 928: string_arg = p; return; default: break; }
 
   #if ENABLED(DEBUG_GCODE_PARSER)
     const bool debug = codenum == 800;
@@ -167,6 +167,7 @@ void GCodeParser::parse(char *p) {
    * Most codes ignore 'string_arg', but those that want a string will get the right pointer.
    * The following loop assigns the first "parameter" having no numeric value to 'string_arg'.
    * This allows M0/M1 with expire time to work: "M0 S5 You Win!"
+   * For 'M118' you must use 'E1' and 'A1' rather than just 'E' or 'A'
    */
   string_arg = NULL;
   while (char code = *p++) {                    // Get the next parameter. A NUL ends the loop
diff --git a/Marlin/src/module/configuration_store.cpp b/Marlin/src/module/configuration_store.cpp
index 04f400328..0462f16fe 100644
--- a/Marlin/src/module/configuration_store.cpp
+++ b/Marlin/src/module/configuration_store.cpp
@@ -64,7 +64,7 @@
  *  195  M206 XYZ  home_offset                      (float x3)
  *  207  M218 XYZ  hotend_offset                    (float x3 per additional hotend)
  *
- * Global Leveling:
+ * Global Leveling:                                 4 bytes
  *  219            z_fade_height                    (float)
  *
  * MESH_BED_LEVELING:                               43 bytes
@@ -80,7 +80,7 @@
  * ABL_PLANAR:                                      36 bytes
  *  270            planner.bed_level_matrix         (matrix_3x3 = float x9)
  *
- * AUTO_BED_LEVELING_BILINEAR:                      47 bytes
+ * AUTO_BED_LEVELING_BILINEAR:                      46 bytes
  *  306            GRID_MAX_POINTS_X                (uint8_t)
  *  307            GRID_MAX_POINTS_Y                (uint8_t)
  *  308            bilinear_grid_spacing            (int x2)