This has been reported as an issue to support but the resulting reply is that it is by design see LCS issue 677645 - By design

Vendor invoice Approval Journal reversing entries have incorrectly summarising tax amounts https://fix.lcs.dynamics.com/Issue/Details?bugId=677645&dbType=3&qc=ab54096df3971b2d465c24725a112d6610e05a2c27f3fd5dbc4c94bda072eee2.

The comments on the issue invited me to add this as a suggestion to correct the the general ledger transaction list report.

In summary in accounts payable if you have a registered invoice with multiple lines each with tax when these lines are reversed in the invoice approval journal the tax amounts for each line are correctly written to the tax tables. However when they are reported on the general ledger transaction list the tax amounts are incorrectly summarised on one line. This would be useful when trying to reconcile tax amounts when preparing quarterly tax returns for the government taxation authority.