Wrong results with IN lists and indexes in territory based collation

The sequence below shows that a query returns 1 row when there is no index on the table, and it returns 0 rows when an index is created. It should return 1 row regardless of the index's presence.

ij version 10.9
ij> connect 'jdbc:derby:memory:colldb;create=true;territory=no;collation=TERRITORY_BASED';
ij> create table t(x varchar(40));
0 rows inserted/updated/deleted
ij> insert into t values 'Stranda Idrottslag', 'Aalesunds Fotballklubb';
2 rows inserted/updated/deleted
ij> select * from t where x in ('Aalesunds Fotballklubb', cast('xyz' as char(3)));
X
----------------------------------------
Aalesunds Fotballklubb

1 row selected
ij> create index i on t;
0 rows inserted/updated/deleted
ij> select * from t where x in ('Aalesunds Fotballklubb', cast('xyz' as char(3)));
X
----------------------------------------

0 rows selected