If you happen to be in a sub-objective’s radius when it starts, it won’t actually start charging, but you’ll still periodically get 25 points for standing in its radius anyway. It’ll start charging if you leave its radius and enter it again.
The first time a sub-objective starts in a match, it won’t have this bug. The bug only seems to start happening if the sub-objective starts again after being completed at least once.
Notes / Media
The sub-objective in the video is set to auto-spawn on every day. I’ve also had the bug happen with sub-objectives that have auto spawn off and are only started via IO outputs.