I have been using Pred drone and have fired numerous times for targets 45 sec out watched time count down with no impact well within the designated firing range this is idiotic.
Did you lock on properly? I made a short demonstration video, you need the square showing that lock is fixed in place. Sadly, this is the best I can give because of the very small file size limit.
IOG also doesn’t seem to work, so you can’t fire and forget it, you gotta keep camera on target till impact.