When I start my project from the editor, everything works perfectly, but when I pack my project only a few widgets are shown. When I start it with Standalone it works perfectly too. Sorry for my English, I use a translator.
I had the same problem and I put a delay of .2 second between my “Cast to first person mode” and my variable which “Set” my “widget” which allows the text to display
Souvent dans Unreal les commandes passe tout droit, trop vite, en ajoutant un délai lorsque possible, ça laisse le temps au script de se déployer…alors test ça et j’espère que ça marche pour toi!