Watch band wiggles?

Hello! I have an apple watch series 7 with the Nike sports band. I took the band off today to clean the watch, and when I put it back on, I noticed the bottom band had a slight wiggle. It clicked into place but still has a wiggle. The top band clicked into place and has zero movement. I checked my brother's series 6, and it also had movement in the bottom band.

I was wondering if this is normal to have a little movement in the bottom band. I use my watch while running and working out, so I just want to make sure the band won't fall off. Thanks for any help!