@th check the nozzle, and clean its underside with a wire brush (careful around the heater block cables) and an IPA-soaked paper towel. if it's too dirty, I usually remove it and burn it out with a propane torch.
the problem is when the nozzle accumulates too much gunk on its underside and that causes it to stick to the printed plastic.
But besides, I do think your first layer z height is too much.
@th yay!!