If you want to use open level, then you have to reposition the player after the level has opened. Assuming the level is not also spawning a player from the game mode.
You can do that from the player or GI, but not until ‘open level’ has finished. There is no ‘call back’ to let you know when that’s happened.
One way to know, is to put a well known actor in the level, with an actor tag. When you can see the actor, it’s ok to move the player.