Hi @AxelCapek, the implementation of this API is meant to operate on all the players in a play space. It is unfortunate that the method is currently in player_ui as I’m sure this is the source of the confusion. We will soon change the API entry point to make it clear that this operates on all players and we will update the documenation of player_ui.HideHUDElements to note that it currently operates on all players.
It is also clear from your use case that there is a need to be able to hide and show HUD elements per-player and that is also something we may implement in a later release.