One of my presses often does the same thing. Same for another member of my club that I am aware of. The spring does provide resistance and maintains control on both the down and upstroke.It will drop down a small amount from the highest point, (never measured it) but not so far as to impact any of the reloading processes, (powder, primer, etc.)
No issues or impacts with this that I can see, as it does not impact reloading.
Kenn