Post void receipt displaying wrong balance when MRC is used as tender type

User has an active merchandise card with balance on it,balance inquiry says ( $1000.00 )

1. Log in to Xstore

2. Add an item

3. Complete sale using Merchandise return card as tender type. (Total Sale amount $75.00)

4. New Balance is $925.00

5. Post Void the above transaction

Note : Post Void receipt displayed Balance amount as $1075.00 instead of $1000 ($925+$75=$1000)

I checked Balance inquiry again and found that its showing me correct value as $1000

I found mismatch only at Post Void receipt, I am not sure if this is Base issue of V16.0.0.0.699 as currently I am using it.

I checked Base class PostVoidIssuedVouchersOp for method handleOpExec() where got wrong value at below line