There is a stop light near the place I work that doesn’t usually get triggered for a left hand turn if I approach it on my motorcycle (Harley, heavy bike). I’m not going to sit there if it doesn’t turn green for me, that’s stupid. I’ve noticed that if I approach the light standing up on the foot boards, the green light gets triggered. I “shouldn’t” have to do this, but it seems to work, and is better than getting a ticket.
One thing you might try is riding over the sensor at differents points. We have a bicycle symbol down the center of the detector circle that tells you where the sensitive spot is located. I can consistently trip left turn lanes on my bicycle.