Repeater Locking acts differently depending on whether it outputs to redstone dust vs. to another repeater

This setup sends a one-tick pulse to the locking repeaters every time I press the button.

What I expected to happen was that... both pistons would be activated when I allowed to pulses to travel through the line of locking repeaters.

What actually happened was... only one piston was activated.

Steps to Reproduce:
1. Build the setup shown in picture #1. The repeater inside the monostable circuit (the lambda shaped stone brick thing that turns button presses into 1-tick pulses) is on the 2-tick setting. The other repeaters are on the 1-tick setting.
2. Activate both levers.
3. Press the button.
4. Deactivate both levers. You should now be seeing picture #2.
5. Press the button. You should now be seeing picture #3 (except for the sponges). This is unexpected- I expected the far piston to be activated, along with the 2 redstone dust and 1 repeater marked by the sponges.

Edit: This bug is not present in 1.7.10. The expected result is shown in picture #4. Note that the 1.7.10 setup requires the monostable circuit's repeater to be on the 3-tick setting in order for the same results to occur. I assume this is related to and/or the source of this bug.