It is normal procedure for an appeal to lapse after it has been changed in your favour on reconsideration. However you are still entitled to appeal if you are still dissatisfied with the outcome.
The appeal should only lapse if the appellant receives everything they were asking for on a reconsideration, by way of a just and proper award.
If the appellant does not receive what they expected, the appeal should continue and the papers passed to the Tribunal Service for a hearing to be arranged.
Nothing on this board constitutes legal advice - always consult a professional about specific problems