Roller Rockers extremely loose after engine rebuild. Is this normal?

[Hazieview]

Hey, I was wondering if it was normal to have to go back and readjust your rockers a few times after a new engine build. I broke in the engine, started it a few times to set timing and check for leaks, and drove it about 1/4 of a mile to check everything.

I heard my roller rockers chattering so I pulled the valve covers and man about 3 of them were extremely loose. I have flat hydraulic lifters and roller tip rockers. I also set initial valve lash before first engine break in. Now I feel I should go back through the entire valve lash Process again.

Is this normal when running roller tip rockers and flat hydraulic lifters after a fresh rebuild?

Thanks!