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Details
-------

 - WordPress version: [ version ]
 - ACF version: [ version ]
 - For UX/UI issues: [ OS, browser name and version ]
 - Allow null: [ true | false ]
 - Multiple values: [ true | false ]
 - Stylised UI: [ true | false ]
 - Condtional logic: [ true | false ]
 - Rules: [] <!-- If conditional logic is true -->

Reproduction
------------

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relevant information as possible, such as:

### Bug summary

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### Steps to reproduce

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### Actual result

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### Expected result

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