Index based search have issues with 11.20

Hi

This is to check regarding an issue we came across on postgreSQL community
version 11 with minor patch 11.20 along with few other changes
change details mention on end part of this mail

The issue is notice after the minor patching from postgreSQL 11.16 to 11.20
The particular database runs on a dockerized platform

Issue :

One of the table query not woks when string values are filtered with =
clause
where as the query works with like clause using '%' flag or using
trim(column)
below are query examples describes the problem

not working

select * from atlas_order.gdp_ship_logistic_food cgslf where
shipping_group_id = '2VxFRCOG9tc7SjQ2Ogg0bveve96';

working

select * from atlas_order.gdp_ship_logistic_food cgslf where
shipping_group_id like '%2VxFRCOG9tc7SjQ2Ogg0bveve96%';
select * from atlas_order.gdp_ship_logistic_food cgslf where
shipping_group_id like '2VxFR%COG9tc7SjQ2Ogg0bveve96';
select * from atlas_order.gdp_ship_logistic_food cgslf where
trim(shipping_group_id) = '2VxFR%COG9tc7SjQ2Ogg0bveve96';

Later as per the feedback from dev we have dropped and recreated the
constraints and rebuild the indexes of the affected tables
and the data is accessible after on

the similar pattern is noticed across other tables related to primary -
foreign key relationships

Could you please provide a feedback whether similar issues are reported on
11.20 release
or what could be the reason for the error

Changes executed

1. PostgreSQL minor version upgrade from 11.16 to 11.20
2. Change docker container base image from Debian to Alpine (Debian
Bookworm - alpine3.18)
3. Adding PGSENTINEL extension to collect active sessions details
4. Changing session limit for superuser from 3 to 20
5. Kernel Patching from version 3.10.0-1160.76.1.el7.x86_64 to
3.10.0-1160.99.1.el7.x86_64

Note : The OS got restarted as part of the maintenance

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