Whether the appeal against the 22 October 2014 reimbursement decision had become moot after the insurer issued replacement decisions.
Yes. The replacement decision of 22 October 2015 fully satisfied the appellant's conclusions, so the appeal was moot and the case had to be struck from the roll.
Under Art. 53(3) LPGA and Art. 83 LPA-VD, the authority may reconsider its decision before filing its pre-trial statement; once the later decision replaced the challenged one and granted the appellant what he sought, no further review of the merits remained necessary.