Falling edge mono-stable circuit doesn't work

A falling edge monostable curcuit is a device that sends a very short pulse after the button deactivates.

What should happen:
When the redstone torch activates the repeater should receive a pulse like the one on the right.( as shown in the video)

What happened:
When the torch reactivates, the repeater on the left circuit did not receive a pulse.

[This has been a a bug since 1.0.0]