BUG #17190: lock contention high in postgreSQL13.3 wrt GCC/llvm

The following bug has been logged on the website:

Bug reference:      17190
Logged by:          ashkil dighin
Email address:      ashkildighin76@gmail.com
PostgreSQL version: 13.3
Operating system:   RHEL8.4
Description:

Example Perf data for 24vu(TPCC)
--------------------------------

     20.99%  postgres  postgres            [.] LWLockAcquire
     7.09%  postgres  postgres            [.] _bt_compare
     8.66%  postgres  postgres            [.] LWLockRelease
     2.28%  postgres  postgres            [.] GetSnapshotData
     2.25%  postgres  postgres            [.] hash_search_with_hash_value
     2.11%  postgres  postgres            [.] XLogInsertRecord
     1.98%  postgres  postgres            [.] PinBuffer
Is there way to tune the lock contention ?
Is any recommendations to tune/reduce the lock contention via
postgres.conf(like buffers).
Postgres.conf 
===========
shared_buffers = 64000MB                        
huge_pages = on                
temp_buffers = 4000MB                  
work_mem = 4000MB                      
maintenance_work_mem = 512MB           
autovacuum_work_mem = -1               
max_stack_depth = 7MB                  
dynamic_shared_memory_type = posix     
max_files_per_process = 4000           
effective_io_concurrency = 32          
wal_level = minimal                    
synchronous_commit = off               
wal_buffers = 512MB                    
#checkpoint_segments = 256             
checkpoint_timeout = 1h         
checkpoint_completion_target = 1       
checkpoint_warning = 0         
log_min_messages = error               
log_min_error_statement = error
log_timezone = 'GB'
autovacuum = off                       
datestyle = 'iso, dmy'
timezone = 'GB'
lc_messages = 'en_GB.UTF-8'            
lc_monetary = 'en_GB.UTF-8'            
lc_numeric = 'en_GB.UTF-8'             
lc_time = 'en_GB.UTF-8'                
default_text_search_config = 'pg_catalog.english'
max_locks_per_transaction = 64         
max_pred_locks_per_transaction = 64