[x] When you add an additional contact and label it, it also adds the label for the default contact underneath the new label. See loom recording (Notion issue 38)
[x] You can't remove contact details you have added. See loom recording. (Notion issue 39)
[x] It can appear as if you have removed contact details by clearing the fields, saving and exiting the customisation area despite the warnings. Though the contact details you have tried to remove remains in the published app. See loom recording. (Notion issue 40)
Summary As reported by Maggie in Notion: