Command spell (Prone) bugged / applied wrong

[StoneFire!☭]

So the spell says that the command is carried out on the target's turn, like it is in D&D 5e, but instead it's done on the caster's turn so when the target's turn comes around it just stands back up, thus making it a far worse command than it should be.

https://steamcommunity.com/sharedfiles/filedetails/?id=3015566730