I understand that a bug is known to happen with choice scarf occasionally when you engage in PVP after first relogging, but this has been happening more frequently in the past week. I know that the other individuals do not have a choice scarf as well; I see them use multiple moves and/or impacted by a life orb/leftovers. I've tried removing my pokemon with the scarf from the start of a battle, but it still happens halfway through it.
I seldom experienced this issue before, but it has recently increased significantly and has cost me rank.