VM stops randomly while connected to it's spice display

Oct 7, 2019
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I'm having an issue with a couple of VM's which use Spice display. They are accessed remotely using virt-viewer. The VMs randomly stop if user is connected to it's spice display. It does not stop if user does not connect to it. It may happend a couple times a day or they may work for a week. When the VM stops I can see this error in the Proxmox VE host syslog:

Code:
Jun 17 10:46:45 pve03 kernel: [5791953.634053] SPICE Worker[633379]: segfault at 100000027 ip 00007fe6104e29e3 sp 00007fe1cd3f60a0 error 4 in libc-2.28.so[7fe610483000+148000]
Jun 17 10:46:45 pve03 kernel: [5791953.634062] Code: 8d 3d d9 47 10 00 e8 4c e0 ff ff 48 8d 0d 55 4f 10 00 ba 67 02 00 00 48 8d 35 5c 09 10 00 48 8d 3d 1a 47 10 00 e8 2d e0 ff ff <4c> 39 68 28 75 36 49 8b 4d 28 4c 39 69 20 75 2c 48 83 7a 20 00 0f

That host is using Proxmox 6.4 with latest patches:
proxmox-ve: 6.4-1 (running kernel: 5.4.178-1-pve)
pve-manager: 6.4-15 (running version: 6.4-15/af7986e6)
pve-kernel-5.4: 6.4-16
pve-kernel-helper: 6.4-16
pve-kernel-5.3: 6.1-6
pve-kernel-5.0: 6.0-11
pve-kernel-5.4.178-1-pve: 5.4.178-1
pve-kernel-5.4.140-1-pve: 5.4.140-1
pve-kernel-5.4.78-2-pve: 5.4.78-2
pve-kernel-5.3.18-3-pve: 5.3.18-3
pve-kernel-5.3.13-1-pve: 5.3.13-1
pve-kernel-5.0.21-5-pve: 5.0.21-10
pve-kernel-5.0.15-1-pve: 5.0.15-1
ceph: 14.2.22-pve1
ceph-fuse: 14.2.22-pve1
corosync: 3.1.5-pve2~bpo10+1
criu: 3.11-3
glusterfs-client: 5.5-3
ifupdown: 0.8.35+pve1
ksm-control-daemon: 1.3-1
libjs-extjs: 6.0.1-10
libknet1: 1.22-pve2~bpo10+1
libproxmox-acme-perl: 1.1.0
libproxmox-backup-qemu0: 1.1.0-1
libpve-access-control: 6.4-3
libpve-apiclient-perl: 3.1-3
libpve-common-perl: 6.4-5
libpve-guest-common-perl: 3.1-5
libpve-http-server-perl: 3.2-4
libpve-storage-perl: 6.4-1
libqb0: 1.0.5-1
libspice-server1: 0.14.2-4~pve6+1
lvm2: 2.03.02-pve4
lxc-pve: 4.0.6-2
lxcfs: 4.0.6-pve1
novnc-pve: 1.1.0-1
proxmox-backup-client: 1.1.13-2
proxmox-mini-journalreader: 1.1-1
proxmox-widget-toolkit: 2.6-2
pve-cluster: 6.4-1
pve-container: 3.3-6
pve-docs: 6.4-2
pve-edk2-firmware: 2.20200531-1
pve-firewall: 4.1-4
pve-firmware: 3.3-2
pve-ha-manager: 3.1-1
pve-i18n: 2.3-1
pve-qemu-kvm: 5.2.0-7
pve-xtermjs: 4.7.0-3
qemu-server: 6.4-2
smartmontools: 7.2-pve2
spiceterm: 3.1-1
vncterm: 1.6-2
zfsutils-linux: 2.0.7-pve1

Any had this issue before?
 

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