I am not sure, wether this finding is relevant or not but looking at the nova-compute.log, following traceback is commonly observed.

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2022-09-30 09:12:47.756 7 DEBUG nova.virt.ironic.driver [req-4987498c-9b47-4c3f-ab65-af8bfccf8b6b - - - - -] Returning 4 available node(s) get_available_nodes /usr/lib/python3.6/site-packages/nova/virt/ironic/driver.py:899
2022-09-30 09:12:47.764 7 ERROR nova.compute.manager [req-4987498c-9b47-4c3f-ab65-af8bfccf8b6b - - - - -] No compute node record for host undercloud.localdomain: nova.exception_Remote.ComputeHostNotFound_Remote: Compute host undercloud.localdomain could not be found.
2022-09-30 09:12:47.764 7 DEBUG nova.compute.resource_tracker [req-4987498c-9b47-4c3f-ab65-af8bfccf8b6b - - - - -] Auditing locally available compute resources for undercloud.localdomain (node: aed2b0f6-8506-48db-9fea-3df1801301d4) update_available_resource /usr/lib/python3.6/site-packages/nova/compute/resource_tracker.py:870
2022-09-30 09:12:47.765 7 DEBUG oslo_concurrency.lockutils [req-4987498c-9b47-4c3f-ab65-af8bfccf8b6b - - - - -] Lock "ironic-node-aed2b0f6-8506-48db-9fea-3df1801301d4" acquired by "nova.virt.ironic.driver.IronicDriver._node_from_cache.<locals>._sync_node_from_cache" :: waited 0.000s inner /usr/lib/python3.6/site-packages/oslo_concurrency/lockutils.py:327
2022-09-30 09:12:47.765 7 DEBUG nova.virt.ironic.driver [req-4987498c-9b47-4c3f-ab65-af8bfccf8b6b - - - - -] Using cache for node aed2b0f6-8506-48db-9fea-3df1801301d4, age: 0.009539365768432617 _sync_node_from_cache /usr/lib/python3.6/site-packages/nova/virt/ironic/driver.py:1018
2022-09-30 09:12:47.765 7 DEBUG oslo_concurrency.lockutils [req-4987498c-9b47-4c3f-ab65-af8bfccf8b6b - - - - -] Lock "ironic-node-aed2b0f6-8506-48db-9fea-3df1801301d4" released by "nova.virt.ironic.driver.IronicDriver._node_from_cache.<locals>._sync_node_from_cache" :: held 0.000s inner /usr/lib/python3.6/site-packages/oslo_concurrency/lockutils.py:339
2022-09-30 09:12:47.766 7 DEBUG nova.compute.resource_tracker [req-4987498c-9b47-4c3f-ab65-af8bfccf8b6b - - - - -] Hypervisor/Node resource view: name=aed2b0f6-8506-48db-9fea-3df1801301d4 free_ram=0MB free_disk=0GB free_vcpus=unknown pci_devices=None _report_hypervisor_resource_view /usr/lib/python3.6/site-packages/nova/compute/resource_tracker.py:1023
2022-09-30 09:12:47.766 7 DEBUG oslo_concurrency.lockutils [req-4987498c-9b47-4c3f-ab65-af8bfccf8b6b - - - - -] Lock "compute_resources" acquired by "nova.compute.resource_tracker.ResourceTracker._update_available_resource" :: waited 0.000s inner /usr/lib/python3.6/site-packages/oslo_concurrency/lockutils.py:327
2022-09-30 09:12:47.774 7 WARNING nova.compute.resource_tracker [req-4987498c-9b47-4c3f-ab65-af8bfccf8b6b - - - - -]
No compute node record for undercloud.localdomain:aed2b0f6-8506-48db-9fea-3df1801301d4: nova.exception_Remote.ComputeHostNotFound_Remote: Compute host undercloud.localdomain could not be found

Following are logs:-
1. https://logserver.rdoproject.org/openstack-periodic-integration-stable4/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-8-ovb-3ctlr_1comp-featureset035-train/e8133d7/logs/undercloud/var/log/containers/nova/nova-compute.log.txt.gz
2. https://logserver.rdoproject.org/openstack-periodic-integration-stable4/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-8-ovb-3ctlr_1comp-featureset035-train/def17bd/logs/undercloud/var/log/containers/nova/nova-compute.log.txt.gz