If you can test it with something else than v5.3… because it definitely does work:
I am expecting a bug since I have no clue how to even reproduce this behaviour…
Aren’t action values dependent on the intensity of the input?
You might be thinking of Actuation Threshold which only matters for analogue input. For keyboard keys, it’s either 0 or 1 and then multiplied by a Scalar. It’s nifty, I’ve been using it since that one time I had it explained.