Since updating to LR Classic CC 7.2 for PC, toggle seems unaware of initial state. When B is pressed to add a photo to target collection, the confirmation message that comes up is "Removed from Target Collection," and the photo is not added. When B is pressed to remove a photo, the confirmation message is "Added to Target Collection" and the photo is not removed. This happens erratically, and behavior can be fixed by restarting LR. Problem is specific to the February 2018 update.