When repeaters recieve a 1-tick pulse, they lengthen the tick depending on the number of ticks they are set to.

Steps to Reproduce

Set up a circuit as seen in the screenshot. This circuit will produce a 1-tick pulse when the block in front of the observer is updated.

1. Place/remove a block in front of the observer. The redstone torch will not blink off, this may be due to a different bug, but let's ignore that.

2. Set the last repeater in the circuit to 2 ticks, then place/remove a block in front of the observer. The repeater will blink off, but you will notice that it is noticeably longer than one tick.

3. Set the last repeater in the circuit to 3 ticks, then place/remove a block in front of the observer. The repeater will blink off, but this time it will blink off for longer than the previous time.

4. Set the last repeater in the circuit to 4 ticks, then place/remove a block in front of the observer. The repeater will blink off, this time even longer than the last time.

This is not intended behavior, repeaters are supposed to delay redstone inputs, not lengthen them.