If crosswalk doesn't have a bicycle lane painted, you are supposed to walk the bike across it. If you are riding the bike on the crosswalk, it is wrong. Pedestrians walk about 5 km / h, while cyclist can move easily 3 times that speed. When turning left, you have a lot of things to watch out for, and "pedestrian" moving at 15 km / h can be a surprise - like you ran in front of her truck.

So if no bike lane -walk the bike and you're 100% right.

One more thing - when crossing road, look and make sure it is safe. When I drive a car, turning, pedestrian light is RED, but just as I'm 1 meter away from the crosswalk, it turns GREEN. An impatient man just jumped straight forward, without looking. Fortunately I was prepared for such careless reaction, had my foot on the brake and stopped. Point: sudden movements are dangerous and are not right. Both pedestrians and drivers should be considerate - we are all just humans.