BUG #18455: DST information is flagged wrongly

The following bug has been logged on the website:

Bug reference:      18455
Logged by:          gowtham kumar
Email address:      gkchinna.oracle@gmail.com
PostgreSQL version: 14.11
Operating system:   Linux
Description:

Hi Team,

Appears that for the timezone "Europe/Dublin" the is_dst is flagged
wrongly.

From the IANA data I can see "Europe/Dublin" is following the DST 

zdump -v /tmp/tzdb/zoneinfo/Europe/Dublin  | grep -i '2024'
/tmp/tzdb/zoneinfo/Europe/Dublin  Sun Mar 31 00:59:59 2024 UTC = Sun Mar 31
00:59:59 2024 GMT isdst=1
/tmp/tzdb/zoneinfo/Europe/Dublin  Sun Mar 31 01:00:00 2024 UTC = Sun Mar 31
02:00:00 2024 IST isdst=0
/tmp/tzdb/zoneinfo/Europe/Dublin  Sun Oct 27 00:59:59 2024 UTC = Sun Oct 27
01:59:59 2024 IST isdst=0
/tmp/tzdb/zoneinfo/Europe/Dublin  Sun Oct 27 01:00:00 2024 UTC = Sun Oct 27
01:00:00 2024 GMT isdst=1

However, from the pg_timezone_names it is flagged to false though it is
actually following the DST 


postgres=# select substr( version(), 1, 17);
      substr       
-------------------
 PostgreSQL 14.11 
(1 row)

postgres=# select * from pg_timezone_names where name ilike '%dublin%';
     name      | abbrev | utc_offset | is_dst 
---------------+--------+------------+--------
 Europe/Dublin | IST    | 01:00:00   | f
(1 row)

utc_offset and abbrev is reflecting the correct data and the timestamp as
well is giving output as expected.

Is the information from the is_dst flag can be treated as bug?