From every ui device ie tracker stat creator thing the hud device i have never had a issue with. This is my number one thing for ui that i use. jip players it works fine but understand you may need a delay as the player maybe in the world and could potentially trigger events but the player may not have been assigned a FortCharacter yet so this could be the reason your seeing issues. I always have a sleep of about 5.0 after any jip function and this seems to be enough for any hud/teleporters ect to work. Other people have done systems to check for when a player is running/moves this is also a good method.
Take that into account for jip players and i assure you itll work 
Also make sure you dont have any layer/priority conflicts