Hi, For some reason a "Child Record" subtab has started appearing on one of our custom record's form. Any idea how we can hide/remove this Child Records subtab from the form? Thank you in advance.

have you check the form setup of the custom records?

@Tyn Guardian Yes, I did, there is no entry in the "Child Records" sublist. Also checked the Custom Form setup, and there is no such entry (Child Records) in the list of "Subtabs".

Is there a possibility that you've turn a feature?