Fix T66768: Grid fill span not working

source/blender/editors/mesh/editmesh_tools.c

@@ -4593,7 +4593,8 @@ static int edbm_fill_grid_exec(bContext *C, wmOperator *op)
 
       /* Only reuse on redo because these settings need to match the current selection.
        * We never want to use them on other geometry, repeat last for eg, see: T60777. */
-      if ((op->flag & OP_IS_REPEAT_LAST) == 0 && RNA_property_is_set(op->ptr, prop_span)) {
+      if (((op->flag & OP_IS_INVOKE) || (op->flag & OP_IS_REPEAT_LAST) == 0) &&
+          RNA_property_is_set(op->ptr, prop_span)) {
         span = RNA_property_int_get(op->ptr, prop_span);
         span = min_ii(span, (clamp / 2) - 1);
         calc_span = false;