Only queue babysteps if axis is in a known position

Marlin/temperature.h

@@ -431,6 +431,7 @@ class Temperature {
     #if ENABLED(BABYSTEPPING)
 
       static void babystep_axis(const AxisEnum axis, const int distance) {
+        if (axis_known_position[axis]) {
           #if IS_CORE
             #if ENABLED(BABYSTEP_XY)
               switch (axis) {
@@ -457,6 +458,7 @@ class Temperature {
             babystepsTodo[axis] += distance;
           #endif
         }
+      }
 
     #endif // BABYSTEPPING