The Lenovo P52 is a piece of shit when used with a Thunderbolt Dock.
It has so many problems that it might as well be a paperweight.
First, it doesn’t always work. Sometimes you need to power cycle it 5 times before it recognizes it and functions.
Then you have issues like “doesn’t wake from sleep” and “Doesn’t fully shut off so it won’t turn back on until you force power off it”