[solved] Access to Itemlist values in For Each Operator

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I have a process [1] in which you enter qualifications for people.
Then I have another process [2] in which qualifications are also entered and when the step is exited, the data from process [2] should be entered into process [1] via a subworkflow.
The data that comes from process [2] is in an item list and should all be entered individually (as separate instances) into process [1].
Before this, however, a query should be made as to whether the respective instance of the specified person has already been entered in process [1].

Problem: I can't seem to access the value of the item list (qualification) in any form within the For Each, as there is never a value in there as can be seen in the 1st image ('Ausbildung').
I've also tried using a Data Source Value Filter, but I can't get a result because the designer can't seem to access the text.

Does anyone have any tips for me or is this a bug?