Desktop background changes color

[AlbanRampon]

Hello Steel,

I don't understand what resolution issue you might have whilst docking/undocking.
You may be experiencing scaling differences if your native resolution is very different from the external screen resolution. For instance, if you use a native 4K display on the laptop and only 1080p external displays, the icon size would be different but resolution would be correct.
Then only thing changing at logoff/logon would be scaling, not resolution.

The DisplayLink driver has no access to desktop objects: it only rendered sees pixels, and, depending on the dock model, the mouse cursor separately.
To me, the behaviour suggests you might have either profile preferences saved on a Microsoft account which is applied at login, or enforced by some kind of policy/script. Maybe you have an application running handling graphics.

Kind regards,
Alban