Absolutely not. The lifter should never bleed more than the amount of pressure placed on it.

i.e. all pressurized lifters sitting in the motor with no pressure on them (no pushrods installed) should not bleed down AT ALL. Why? Because there is nothing to push the oil out.

Keep this in mind ... depending on RPM you have anywhere from 20 to maybe 70 pounds of oil pressure to pressurize the lifter. You have more than 300 pounds of spring pressure trying to force the oil out of the lifter. Therefore the lifter has to be designed NOT to bleed off that oil easily otherwise you'd never reach the potential of the cam.