maybe you were qui-gon like before you lost your connection maybe kreia and other jedi help in restoring that connection to the force so that it is much like relearning how to ride a bike and you pick up where you left off after a while and are up to taking on an apprentice. another thing is that being one of very few Jedi there isn't exactly a lot of choice as to who wil train who, maybe you and apprentice get flung together in unfortunate circumstances