Admins are unable to see the records in a table:
System Property glide.security.admin.override.accessterm is false. This property when set to false means that, if there are a number of ACLs on the same table/field and admin override is false on one of them, then admin override for all ACLs are considered as false.
Set the system property glide.security.admin.override.accessterm in sys_properties to true. The property value should be true for all new instances.