This may be true. Apparently, this has been on-going since the Charlton game before JFH arrived, could be Jimmy has had enough of this 'niggle' and wants it sorted out once and for all before he gets selected again.
You can see it from the managers point of view, if the player (Long) is not at full throttle he can't do the things the manager wants him to do and Jimmy doesn't come across as a manager who will stand for anything less than full commitment - and rightly so.
So what is long’s beef then ?