Sniper aim sway inconsistency/bug

When testing out the default sniper with the assault class in the firing range, I noticed that the aim sway changes after a certain amount of time. At first, the sway is continuous and the bullets go where the crosshair is aimed at the point of fire (normal), but after a couple minutes of shooting it changes to moving slightly in one direction before stopping completely (not holding breath, using assault class). You would think this would increase accuracy due to the completely still crosshair, except when the bugged sway occurs, the bullet does not go where the sniper crosshair is aimed. This leads me to believe that it's a visual bug and the weapon is still swaying but that sway isn't being displayed on the screen, so bullets don't go where you're aiming. This bug also occurs with the recon class, however the bullets don't seem to miss as often, maybe due to the recon perk of reduced weapon sway (also, the hold breath perk of recon eliminates the problem completely). With the assault class, you cannot hold your breath while aiming which essentially makes sniping with the assault class useless until this bug is fixed. :(