BUG #17059: postgresql 13 version problem related to query.

The following bug has been logged on the website:

Bug reference:      17059
Logged by:          Ram Pratatp maurya
Email address:      ram.maurya@lavainternational.in
PostgreSQL version: 13.0
Operating system:   RHEL 8.3
Description:

Hi team,

I am facing problem related to query.

I have two DB server one is running on postgres12  (RHEL 6) and second is
running on postgresql -13  (RHEL 8.3).
Server H/W configuration is same and postgresql.conf  file configuration
parameter is also same.

When I am running below queary on server postgresql-12 data comes within 2
min and when I run this quear on postgresql-13 server its take 30 min
display result.

Can you please suggest any  problem in postgresql-13.

Note : DB size of postgresql-12 is 242 GB (1 year old data) and DB size of
postgresql-12 is 350 GB.


.........................................................................................................................................................................................................
select
DISTINCT("Order".order_no),"Order".retailer_code,"Order".order_status,OrderDeliveryNote.assigned_to_username,
OrderDeliveryNote.assigned_to_role,
OrderDeliveryNote.delivery_note_no, OrderDeliveryNote.date,
OrderDeliveryNote.total_value,
leave.date, leave.username, RetailerList.retailer_outlet,
DSE_user.first_name, "Order".parent_order_no,
CASE WHEN "Order"."order_status"='dispatched' then 3
WHEN "Order"."order_status"='partially dispatched' then 3
WHEN "Order"."order_status"='acknowledgement pending' then 4
WHEN "Order"."order_status"='delivered' then 2
WHEN "Order"."order_status"='dn pending' then 1 ELSE 0 END AS
"Order__actionable"
from torder "Order"
join tretailer_mst as RetailerList on
"Order".retailer_code=RetailerList.retailer_code
join torder_delivery_note as OrderDeliveryNote on
"Order".order_no=OrderDeliveryNote.order_no
left join tleave leave on "Order".order_no=OrderDeliveryNote.order_no and
leave.date='2021-06-15' and leave.role='DB'
join tuser_mst DSE_user on
OrderDeliveryNote.assigned_to_username=DSE_user.username
where dbr_code='304717' AND (order_status IN (('delivered'),('dn
pending'),('acknowledgement pending'),
('partially delivered')) or ((order_status = 'dispatched' or order_status =
'partially dispatched') and leave.date = '2021-06-15'))
group by "Order".order_no
,"Order".retailer_code,"Order".order_status,OrderDeliveryNote.assigned_to_username,
OrderDeliveryNote.assigned_to_role,
OrderDeliveryNote.delivery_note_no, OrderDeliveryNote.date,
OrderDeliveryNote.total_value,
leave.date, leave.username, RetailerList.retailer_outlet,
DSE_user.first_name, "Order".parent_order_no
order by OrderDeliveryNote.date desc limit 50;