problem with conditional fields

Hello everyone,
I use conditional fields for cf7. The selection options of a second select field are dependent on the selection in the first select field.
However, if a user changes his mind and changes his selection in the first field, there is also a change in the selection options in the second field, as desired. But when the form is sent, both values (the one previously selected and the one then changed) are transferred from the second field.
Does somebody has any idea?
Greetings from the Baltic coast
Andreas

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