[partiallypro]

Windows remembers my window locations when I plug back in. Using a Surface dock with two Dell Ultrasharps. Maybe as someone else pointed it on OSX, perhaps it's the ID the monitors are sending back to your Windows install and it doesn't know which is which because they don't have a unique identifier?

[DEADBEEFC0FFEE]

I think that might be the dock drivers. I remember a universal dock vendor presenting that as a feature.

[sikim]

I'm also using two Dell Ultrasharps with a Surface Dock. I tried updating the driver but no luck for me.