Please find the guidance to switch loads between process server at https://video2.skills-academy.com/en-us/azure/site-recovery/vmware-azure-manage-process-server#move-vms-to-balance-the-process-server-load. You can move the high churning VMs to a new process server without disabling & enabling the replication.
You can also choose to disable replication from portal, then enable replication by excluding high churn disks.
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