Well, you can also do something like this (again in TuneActiveBubbles function):
Change second value in the “<” node to change render distance. It will work even if the character is far, but the main question is “Where do you want to locate Speeech Bubble?”. Character can’t be project on the screen in this situation (ProjectWorldToScreen default function will return (0, 0)), so Speech Bubble location is up to you here. One good solution is just delete “Set Position in Viewport” node.