Debugger fails to activate

I find that @bp often doesn't do anything. Simple example below, where @bp in f works as expected but g does not.

julia> using Debugger
julia> function f(x)
       if x < 0
       @bp
       else
       println("all good")
       end
       end
f (generic function with 1 method)

julia> @run(f(2))
all good

julia> @run(f(-2))
Hit breakpoint:
In f(x) at REPL[11]:2
 1  function f(x)
 2  if x < 0
>3  @bp
 4  else
 5  println("all good")
 6  end
 7  end

About to run: return
1|debug> c

julia> function g(x)
       x = 4
       @bp
       3+x
       end
g (generic function with 1 method)

julia> @run g(3)
7

No source file or test is named. Reproduce the behavior in the Julia REPL using Debugger's @run with the contrasting f and g examples, then trace how @bp is activated; done means the breakpoint in g is hit as expected.