Hello guys, I recently found this discussion while looking for a solution to a similar problem.
Anyway I just wanted to share the work around I ended up using to solve it.
In the “Input” section of your “Project Settings” under “Bindings” instead of defining your input as an Input Action you have to define it as an “Input Axis”. This way the corresponding event in your blueprint will keep firing 1.0 while the button or key is held down and just stop firing once it’s released.
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