All Red Hat Linux Enterprise 7.9 (RHEL 7.9) images which running a kernel version greater than 3.10.0-1160.10.1.el7 are affected by a kernel panic during execution of a pvmove command!
Please find details at https://imagefactory.otc.t-systems.com/home/known-issue-kernel-panic-red-hat-linux-enterprise-7-9