How to properly display checkboxes in shopkeeper?

Question

MODX

Hello, there is a need to display fields with checkboxes. For example, display a table of sizes, in the TV settings I fill in the possible values ​​​​so 33||34when you fill in the admin panel, everything is displayed well as it should, and when you select only one checkbox, then everything is fine too. But if you select several checkboxes in the admin panel, in one product, then the tagmanager2 filter is displayed incorrectly, that is, like this (33||34). Where is the mistake? Or is it necessary to display it correctly in the tagmanager itself?