Accrue on Receipt - Residual left in Unrealised Gain/Loss Transaction

All.

We have a Accrue on Receipt configuration (Match to Invoice setup) in our 12.1.2 environment, and have noticed that unrealised gain/loss entries created on non-functional Invoice entry are not transferred to the realised gain/loss account when the invoice payment made.

As a result, we have a residual amount left in the Unrealised account despite the entry being completed. I find this unusual and would have expected standard Oracle to have reallocated these amounts..

Has anyone else experienced these entries and how have they dealt with the residual balance in the unrealised account? Is it simply a month end task to reconcile and reallocate as necessary.