Been looking everywhere, just hope this helps someone.

As of 1.19.2 the only way that doesn't cause problems would be to use push(). Unless someone is brighter than me lol.

 

    @SubscribeEvent
    public static void onLivingJump(LivingEvent.LivingJumpEvent event){
        float jumpMultiplier = 0.07F;

        if (event.getEntity() instanceof Player){
            event.getEntity().push(0,jumpMultiplier,0);
        }

 

You could instead give the vanilla Jump Boost effect to the entity, but if the entity is a player, then they could tell they have Jump Boost.

Edited February 21, 20232 yr by EveryBlu