pldebugger problems with postgresql 12.1

Hello,

i started writing a console interface for the pldebugger and come across some
issues with the pldebugger extension and postgresql 12.1;

with postgresql 9.6.16 and this basic example, i get what i would expect:

Setup:
CREATE EXTENSION pldbgapi;

CREATE TABLE b( a int );
CREATE OR REPLACE FUNCTION test() RETURNS trigger AS $$
BEGIN
RAISE NOTICE '%', new.a;
END $$ LANGUAGE PLPGSQL;

CREATE TRIGGER test AFTER INSERT ON b FOR EACH ROW EXECUTE PROCEDURE test();

if i set a global trigger for that function and insert into the table, i get most
of the variables:

name value dtype class line U C N
tg_name test name A 0 t f f
tg_when AFTER text A 0 t f f
tg_level ROW text A 0 t f f
tg_op INSERT text A 0 t f f
tg_relid 24613 oid A 0 t f f
tg_relname b name A 0 t f f
tg_table_name b name A 0 t f f
tg_table_schema public name A 0 t f f
tg_nargs 0 integer A 0 t f f
tg_argv NULL text[] A 0 t f f

bug if i run the same example on pg12.1 the variables appear to be empty:

name value dtype class line U C N
tg_name NULL name A 0 f f f
tg_when NULL text A 0 f f f
tg_level NULL text A 0 f f f
tg_op NULL text A 0 f f f
tg_relid NULL oid A 0 f f f
tg_relname NULL name A 0 f f f
tg_table_name NULL name A 0 f f f
tg_table_schema NULL name A 0 f f f
tg_nargs NULL integer A 0 f f f
tg_argv NULL text[] A 0 f f f

if checked this directly from within psql.

exactly same setup, 12.1 instance from debian sid and 9.6 instance is debian buster with
the postgresql repository at http://apt.postgresql.org/pub/repos/apt/

another thing i noticed, the debugger can not display the data within records / rows which is quite
a huge limitation. the corresponding lines within the sourcecode of the extension are empty :|

and i am not capable of extenting it myself, is there any chance to get this working?

thank you!