Thanks for the comment.
Yeah you are right it was either crouch or a shield which prevent you from jumping.
But I was running out of time.
Viewing post in Camelot in Flames jam comments
I feel you! Two days before the end of the game jam, I added a pause menu, but it had a bug where, when I unpaused, the physics engine would go crazy and lag the entire game, making it unplayable. I wasted 4 hours just to find out that the part that detects collisions in the Godot engine really doesn't like when you set the engine time scale to 0. and detect around 10,000 new collisions every time I paused. While I had to set it to a very low number, like 0.001 Instead. I was considering removing the pause menu completely, as I was running out of time and it rendered the game unplayable.