In Minnesota, I believe (they told me this at my 55-alive refresher), a motorcycle may turn left after stopping because it might not trigger the light. I would assume a bicycle could, so I myself would, and if I got stopped I would explain that I can't trigger the light and I would ask what else I am supposed to do. I would expect that a reasonable police officer would understand that situation. If he were having a bad day and gave me a ticket, I would frame it.

However, I am developing a personal policy of not making left turns. I have run into a few situations where I am in the left lane with my arm out signaling for a left turn, and everyone STOPS as if they wonder what I am doing, even if they have the right of way. I don't know if they are trying to be nice, or if they are paralyzed with indecision, or what, but suddenly all the well-known traffic rules are thrown out and we're all playing, "no, please, after you, I insist."

Fortunately, my route to work is simple and short. Things might be different if I had to go ten miles one way in the middle of a major metropolitan area.