I incorrectly identified it as a lamp issue...It should have been a light issue. M apologies

Could you please specify which direction you were heading at this intersection? This may have been the morning sunlight creating a glare in the camera and preventing the left turn signal from activating. Turn signals will also not activate if the first vehicle is stopped ahead of the stop line, in this circumstance the cameras assume it has already passed through the intersection.

This issue has been dealt with.