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Perhaps unsurprisingly, this turned out to be a Nvidia driver issue. Switching from the "X.Org X server - Nouveau display driver from xserver-xorg-video-nouveau" driver to the "NVIDIA driver (open kernel) metapackage from nvidia-driver-550-open" driver seems to have solved the issue.

Perhaps unsurprisingly, this turned out to be an Nvidia driver issue. Switching from the "X.Org X server - Nouveau display driver from xserver-xorg-video-nouveau" driver to the "NVIDIA driver (open kernel) metapackage from nvidia-driver-550-open" driver seems to have solved the issue.