The whole point of the like lock is so people can’t sit liking and unliking your posts without end for the sake of griefing. It isn’t a bug. There is ample time to change your mind about leaving a like so I don’t see why this needs to be changed.
I don’t think the “likes given” part of a profile was meant to be regularly browsed in the first place. Infact, if there was a way to keep likes given private (I don’t mind if users know I liked a post by going to it directly, just hiding /my/activity/likes-given), I would support that.