In the current system design, when reversing general ledger vouchers, the JournalCategory of the reversal vouchers will be set to 0 (None) as per this bug https://fix.lcs.dynamics.com/Issue/Details?kb=4598493&bugId=532943&dbType=3&qc=baefeee4b954e605d477db7d875827d37956df172ba5b69c3c8c9486b9121e29

It would be helpful to appropriately set this value, as some customers rely on this value for custom reports/tracking