Redstone

If a redstone repeater is powered on his side by a redstone comparator, we can't change the state of the repeater. If we turn on first the repeater and then we turn on the comparator, even if we remove the power source of the repeater, the repeater will stay turn on.

How to reproduce it:
1- Pick a comparator
2- Pick a repeater
3- Pick levers
4- Place the repeater
5- Place the comparator on the side of the repeater
6- Powered the comparator
7- Try to powered the repeater but nothing happen
8- Turn off the comparator
9- Turn on the repeater
10- Turn on the comparator
11- Try to change the state of the repeater but nothing happen too