Keyboard shortcut not working

I have a keyboard shortcut assigned to the Stop action of the debugger. This can be seen in the following:

Before the latest UI update (this I believe), the keyboard shortcut was functional. However, after the update, it no longer works. I don't notice any collisions when I search for this shortcut by keystroke as can be seen in the first image. Does anyone have any ideas as to why this isn't working?