After the inlet closing event, the valve may bounce/lift of the seat helped by the pressure differential across the valve (due to boost and inlet ram too late due to high RPM). At this point in time the piston is rising and the cylinder volume decreasing, either the inlet valve is happily seated...
Depending upon your existing valve train (pushrod vs. direct acting, stiff vs. not so stiff, hydraulic vs. solid and not least the amount of reserve spring pressure capacity) you may or may not notice any valve control issues as a result of added boost and just because you don't notice, doesn't...
