Fix NO_VOLUMETRICS bug

Marlin/src/module/configuration_store.cpp

@@ -241,6 +241,9 @@ void MarlinSettings::postprocess() {
 
   #if DISABLED(NO_VOLUMETRICS)
     planner.calculate_volumetric_multipliers();
+  #else
+    for (uint8_t i = COUNT(planner.e_factor); i--;)
+      planner.refresh_e_factor(i);
   #endif
 
   #if HAS_HOME_OFFSET || ENABLED(DUAL_X_CARRIAGE)

Marlin/src/module/planner.cpp

@@ -105,7 +105,7 @@ float Planner::max_feedrate_mm_s[XYZE_N], // Max speeds in mm per second
 
 int16_t Planner::flow_percentage[EXTRUDERS] = ARRAY_BY_EXTRUDERS1(100); // Extrusion factor for each extruder
 
-float Planner::e_factor[EXTRUDERS];               // The flow percentage and volumetric multiplier combine to scale E movement
+float Planner::e_factor[EXTRUDERS] = ARRAY_BY_EXTRUDERS1(1.0); // The flow percentage and volumetric multiplier combine to scale E movement
 
 #if DISABLED(NO_VOLUMETRICS)
   float Planner::filament_size[EXTRUDERS],          // diameter of filament (in millimeters), typically around 1.75 or 2.85, 0 disables the volumetric calculations for the extruder