Projectile teleporting lag

As far as I've seen and tested most projectiles (e.g. Arrow, Snowball, Small Fireball, Potion, ...) lag when being teleported with relative coordinates under 1.0 and will instead use 1.0.
Example:
The command /tp @e[type=Snowball] ~ ~ ~0.1 activated every tick (repeating command block) will instead act as /tp @e[type=Snowball] ~ ~ ~1 activated every 10 ticks