Vendor sub-ledger and GL out of balance

Hi

We have an issue in D365 where a vendor invoice is posting double the amount of GST to the GST ledger account and increasing the amount posted to the Vendor control account by the doubled GST amount.

Example

Vendor invoice $28.75

Expense $25.00

GST $3.75

The posting in D365 is as follows:

GL

Expense/stock $25.00

GST $7.50

Vendor control $32.50

Vendor Sub-ledger

Vendor transaction $28.75

GST Sub-ledger

GST $3.75

This issue is intermittent, it has happened for a PO invoice, PO/project invoice, Vendor invoice with no PO.  Issue has occurred with different users.

Has anyone had this issue before or may what could be causing it. 

Thanks

Michelle