Description:

When your creating in creative mode a box for example where no light can hit the inside, the daylight sensor will still trigger a redstone signal around (15000) when you say for example (/time set 15000).
When you say (/time set night) the daylight sensor is not triggering on that moment a redstone signal.
Also the light of the torch is not inflicting the daylight sensor on anyway.
I do not know or this suppose to be happening like this in fact.
(That for example when there is a torch, the daylight sensor need to make a redstone signal because of the light, like it normally would do in open air).

How to get the bug:

1 - make a box for example with a daylight sensor en redstone in it like on the picture.

2 - when the box is closed, it's not inflicting by the light of the torch.

3 - you see at 13000 ticks (/time set night) it's still doing normal and not triggering a redstone signal.

4 - you see at 15000 ticks (/time set 15000) it's triggering a redstone signal.

Extra info:

The torch does not inflict in anyway the redstone signal.
I other words, when the torch is taken away for example the daylight sensor will still trigger at 15000 ticks (/time set 15000).

The daylight sensor does this behavior not in open air.
And will just work normal if you repeat the same things.
(Like for example on the picture)

Only it will trigger 2 redstone dust at 13000 ticks. (/time set night).
And it will trigger 0 redstone dust at 15000 ticks. (/time set 15000).