When deleting or disabling a ProximityPrompt and then reenabling it with the “Custom” property true it does not show until the player walks away and comes back.
https://gyazo.com/152e7538925a096524b59a9c1af15fb4
I’ve looked through all the API for the object and the service and have found no manual way to make it appear or anything else.
Any help would be appreciated. 
It does fire. It only fires once: when the prompt is originally shown. It doesn’t fire again until the player walks away because the player is still within proximity, you would have to tweak your scripts to prevent the prompt from going away when triggered
I want it to go away so you don’t see it while in a vehicle, that’s what this topic is about.
Have it hidden when the player is in the vehicle, detect when the player leaves the vehicle and then re-enable it
Disable it when
if Humanoid.Sit == true then
disableit()
end
That is exactly what I did. Please read the post.
Make the UI hidden, not the prompt instance. It’s not gonna show again unless PromptShown is fired