Queue Holding Memory even with 0 queue size

 Please help how to overcome this issue, We have as RHEL 9 system with Rabbitmq 3.12.13 and erlang 26.2.2

Below is the overall Memory breakdown  and queue memory shows >400Mb for each queue 

how can i clear this and fix it permanently

[root@]# rabbitmq-diagnostics memory_breakdown
Reporting memory breakdown on node rabbit@…
queue_procs: 10.7166 gb (65.23%)
reserved_unallocated: 5.5706 gb (33.91%)
allocated_unused: 0.0431 gb (0.26%)
code: 0.0376 gb (0.23%)
other_system: 0.0235 gb (0.14%)
other_proc: 0.0229 gb (0.14%)
plugins: 0.0043 gb (0.03%)
other_ets: 0.0027 gb (0.02%)
mgmt_db: 0.0018 gb (0.01%)
atom: 0.0015 gb (0.01%)
metrics: 0.0015 gb (0.01%)
msg_index: 0.0012 gb (0.01%)
binary: 0.001 gb (0.01%)
mnesia: 0.001 gb (0.01%)
quorum_ets: 0.0 gb (0.0%)
connection_other: 0.0 gb (0.0%)
quorum_queue_procs: 0.0 gb (0.0%)
quorum_queue_dlx_procs: 0.0 gb (0.0%)
stream_queue_procs: 0.0 gb (0.0%)
stream_queue_replica_reader_procs: 0.0 gb (0.0%)
connection_readers: 0.0 gb (0.0%)
connection_writers: 0.0 gb (0.0%)
connection_channels: 0.0 gb (0.0%)
queue_slave_procs: 0.0 gb (0.0%)
stream_queue_coordinator_procs: 0.0 gb (0.0%)