With wal2json after https://github.com/eulerto/wal2json/issues/31 all the type specifiers have changed.

eg. before
"columntypes" : [ "int4", "int4", "varchar", "varchar", "varchar", "varchar", "date", "varchar", "varchar", "varchar", "varchar", "geometry" ],
after
"columntypes" : [ "integer", "integer", "character varying(20)", "character varying(4)", "character varying(100)", "character varying(100)", "date", "character varying(100)", "character varying(254)", "character varying(20)", "character varying(2)", "geometry(MultiPolygon,2193)" ],

https://github.com/debezium/debezium/blob/master/debezium-connector-postgres/src/main/java/io/debezium/connector/postgresql/connection/wal2json/Wal2JsonReplicationMessage.java has a big list of type strings and they don't match^.

Looks like you can turn the behaviour off with the plugin option include-typmod=0 but it'd probably be better to support them.

https://www.postgresql.org/docs/current/static/datatype.html#DATATYPE-TABLE has a list of the builtin typenames if that's helpful.