Confirmed for 1.9.1 Full Release
@Torabi - It's accessed through the /give command, with potion effect 23 as the CustomPotion modifier.
I would very much like to see this bug patched, I had hoped to include Splash potions of Saturation in an important gameplay mechanic of a Custom Map I had been working on, but was unpleasantly surprised to find this bug in the process.
Fingers crossed Mojang gets to this in the near future! (:
Confirmed for 1.9.2