Question about multi dropdown menu

Hi all. I have such a problem: I insert a multi-dropdown menu into the screen and assign one of the collections to it, in this case it is the user’s gender, age criterion and administrative districts of his city. Of course, these are three different multi-dropdown menus. Some display the content correctly, but some display the word undefined on all menu items. What can be wrong? I can’t figure it out myself, because the settings for the correct and incorrect fields are the same.

What do you have set in the “Item Label” field?

O, I understood, everything is OK, thank You)

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