Import woocommerce products via All Import (wordpress) plugin?

Question

XML

I import products through the All Import plugin by url. Parent elements are imported correctly. Every parent has related products

<product>
 <id>1</id>
 <name>Parent</name>
 <childs>
   <child>
     <id>10</id>
     <name>Child</name>
   </child>
 </childs>
</product>

and adding {childs[1]/child[1]/name[1]} to the Up-Sells field imports one first child element.
The problem is that the parent has a lot of related products and when adding others, separated by commas,

{childs[1]/child[1]/name[1]},{childs[1]/child[2]/name[1]},{childs[1]/child[3]/name[1]}

only the first child element {childs[1]/child[1]/name[1]} is imported.
Screenshot:

Has anyone experienced this?