BUG #16021: Can create Pk on partitioned table with foreign table as partition

The following bug has been logged on the website:

Bug reference: 16021
Logged by: Stepan Yankevych
Email address: stepya(at)ukr(dot)net
PostgreSQL version: 11.5
Operating system: CentOS Linux release 7.3.1611 (Core)
Description:

As far as I can see the issue has been fixed in 11.5 with following
resolution:
Ignore partitions that are foreign tables when creating indexes on
partitioned tables (Álvaro Herrera)
Previously an error was thrown on encountering a foreign-table partition,
but that's unhelpful and doesn't protect against any actual problem.

But I still can't create Pk on partitioned table

See details:
SELECT version();
PostgreSQL 11.5 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.8.5 20150623
(Red Hat 4.8.5-36), 64-bit

ALTER TABLE fix_capture.fix_message_json ADD CONSTRAINT fix_message_json_pk
PRIMARY KEY (fix_message_id,date_id);
SQL Error [42809]: ERROR: cannot create unique index on partitioned table
"fix_message_json"
Detail: Table "fix_message_json" contains partitions that are foreign
tables.

Have I missed something?