I forgot to mention that when I set the “Interact” key event on my weapon blueprint, it is working when I press E (I link my character BP to the weapon BP with an event). This means that it is working only when I’m overlapping a weapon actor but it is not as soon as I’m anywhere else in my level. This is why I first tried to only set the “Interact” event on my character and remove it on any other BP.
(The first screenshot is my character BP and the second one is the weapon BP)