Hydraulic lifters is making that noise, it is draining oil out when sitting, maybe the little poppet check valve in the lifter has a small piece of trash stuck in it not letting is seal when shut off
How many miles do you have on the motor now?
If less than 500 miles I would drive it for a while longer, especially long trips, more than 50 miles at speeds above 2000 RPM to see if it will clean up
Good luck