[MC-85529] Disappearance of ThrownPotions

Modnote

Splash potions are now a seperate item (splash_potion) and both potion and splash_potion don't use the Damage value anymore to determine their type but instead use the tag Potion inside their tag tag.

I tried writing a summon-command for a ThrownPotion on my own... because that didn't get me any entity I searched it up and used CDFMan's example:
/summon ThrownPotion ~ ~ ~ {Potion:{id:373,Damage:16453,Count:1}}
Does this not work anymore? When executing it NOTHING happened... well... the third time I executed it my game crashed and I had to remove all entities in that area (mcedit) to be able to enter the world again...
Before the first crash I tested for all entities but no ThrownPotion was listed...
Am I just doing something wrong? If yes please help me there

Sincerely, Stupping