Whether the appeal had become moot after the respondent reconsidered the challenged decision.
The contested decision was withdrawn through reconsideration; the dispute on the calculation basis became moot and the case had to be struck off the roll, with referral for a new decision.
Before transmitting its response to the appellate court, the insurer may reconsider a challenged decision under Art. 53 para. 3 LPGA. Since the office itself acknowledged the decision was manifestly erroneous and would issue new decisions consistent with the correct 73% rate, there was no longer a live dispute on the merits.