i had a lifter clapping a while back when i went a quart low on oil, topped off with 40 weight oil, it stopped doing it 3 days later. ( it had done it a few times like 5 or 6 ticks and stop in the past, here and there) hasn't done it since, been a few months now.

from when i did my own searching about lifters ticking, everyone says it completely normal if it goes away with in a few minutes, thicker oil should help tho.