Come on ! stop it, I still have to deal with the fact that OP was right about indicating right and going straight will not result in fine (like, never for real )
Update:
So I talked with someone competent here (so not myself this time) and I was told that "Yea, you can see that right indication on traffic lights is working well, bye" so my guess is that you found another funky loophole that could be described and included in box of "if you try hard enough you can do it" semi-cheats, so in conclusion we know about it and we are not going to do anything with it at the moment

Thanks though, this was fun.