I had to reboot igloo which is one of our physical hosts which hosts the mail server among others. It was necessary because after making a backup of mail, it would not complete a boot with the CPU tasks hanging. Something was corrupted with the KVM hypervisor on the physical host. I did discover that it was missing some of the Linux firmware and installed that which was missing. I kind of doubt this was the issue but you never know.
Meanwhile, 5.19.2 has not tested good on my server so at this point kernel upgrades next Friday are off UNLESS 5.19.3 comes out between now and then.