This is common on lots of airplanes. When you select the gear up there is a small amount of pressure sent to the brakes to stop the rotation before they go into the wheel wells.
That pressure will dissipate anyway, but the valve that causes the braking is disabled once down is selected.
On some other airplanes there is a requirement to apply the brakes before selecting up.
The nose gear normally hits skid pads once it is almost up and the rotation is stopped.