Comment 8 for bug 1493921

I have exactly the same issue and can't use Linux for Home office: daily docking/undocking cycles:
See bugreport [1] Linux for HomeOffice - Sporadic X11 crash when docking/undocking "Failed to enter VT"

My system config:
Most recent Ubuntu 20.04LTS and KDE Plasma version
Dell Precision 15" 7540, Xeon E-2286M@2.4GHz, 128 GB ECC RAM, NVIDIA Quadro RTX 5000 16GB VRAM
Dockingstations at Home and Offices: WD19DC (240W)
Monitors used for Linux migration Office1: 2x 4K U4320Q, 42.5" @ 96dpi font / No scaling a
Monitors used for Linux migration Office2: 2xU3818DW, 37.5"
Monitors used for Linux migration at home: 3x FullHD Dell monitors

[1] https://gitlab.freedesktop.org/xorg/xserver/-/issues/1197