CH breakers wiggle

Hey guys;
I just changed out a breaker in my CH (brown handles) panel. After re-installing the cover, and making sure it is properly seated, I notice that all of the breakers will wiggle slightly when moved up and down (in the Y plane, not the Z) with respect to the top and bottom of the panel.
I'm referring to the entire breaker, not just the handle.

I am pretty sure this is normal, as I seem to recall this being the case even when the panel was bran-new.
But being the 'what if' sort, I just want to be sure it's OK.


Thanks
FW