"good first issue" does not work for me

The magic good first issue label does not seem to work.
I’ve labeled one of my issues with this label,
just to see if it works, and it does not:

https://github.com/chubin/cheat.sh/labels/good%20first%20issue
https://github.com/chubin/cheat.sh/contribute

As you can see, the issue is appearing in the first list, but not in the second one.
I see, though, that it works for other repositories, at leat for some ones.
What am I doing wrong?

It seems to me that the label itself should be marked somehow, but how?

1 2 3 4 5 6 7 8 9 10

It works now. So the problem was the caching; if you have save this problem, just wait several days and everything will work