Field IDs displayed for empty fields in email notifications

Since recently, empty or unselected fields in BAForms email notifications are no longer hidden. Instead, the internal Field ID is displayed in the email, for example:

[Field ID=59]
[Field ID=60]
[Field ID=21]

Fields that are filled in or selected are still displayed correctly.

Previously, empty or unselected fields were simply not shown in the email.

Is this a known issue or a bug in the current BAForms version?

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