Never install any engine component that will rotate or spin dry, NEVER
I oil the sides of any lifter type and use cam lube on the bottoms only of flat tappet solids and hydraulic with the oil the motor will be broke in with, none(cam lube) on the sides at all
OP, some lifters won't bleed down as easily as others
Worst yet is they all don't pump up the same as easily as others when priming them
The more you do engine work the more you learn