Random VM freezes on AMD node in mixed CPU cluster (Proxmox 8.4.1)

[mlukasik]

Hi all,
I have a Proxmox cluster with six nodes:

• 5x Intel CPUs
• 1x AMD CPU

Since adding the new AMD-based server, VMs randomly freeze—most often when running on the AMD node.
Setup details:

• Shared storage: SAN array
• Filesystem: OCFS2 (used for snapshots and shared access)

Typical VM config:

• Memory: no ballooning
• CPU: x86-64-v2AES (NUMA enabled)
• BIOS: SeaBIOS
• Machine: i440fx
• SCSI Controller: VirtIO SCSI
• Disk: write-back cache, Async IO: threads
• qemu-guest-agent installed on all VMs

I've tested KVM64 and QEMU64 CPU types—no improvement. Host-passthrough or Intel/AMD-specific CPU types aren’t an option due to the need for live migration (a balancer is in use).
I've recently started switching machine type from i440fx to q35, but the issue still occurs.
Any ideas what else I can check or try to fix this?
Proxmox version: 8.4.1

Thanks in advance!