u/Siphon_Gaming_YT

I am a student making a prototype game for school, I am trying to start an onscreen timer at the end of a cutscene through an event in the cutscene.
However, no matter what i do, the bool I use for a branch does not change from its default value despite the prints telling me that the custom events that change the bool's value are called.

What am I doing wrong or not understanding?
(I have images that can't be added in the post)