FCCS_CTA/FCCS_CICTA and FCCS_Mvmts_FX_Movement

Hello, I am getting an unbalanced balance sheet at parent currency due to data in FCCS_CICTA, FCCS_Mvmts_FX_Movement that does not sum to zero. I can understand the following movements in the FCCS_CTA/FCCS_CICTA account - FCCS_OpeningBalance, FCCS_Mvmts_FX_Opening and FCCS_Mvmts_FX_to_CTA - but FCCS_Mvmts_FX_Movement seems to make no sense. Other customers apps that I have checked do not have data in FCCS_Mvmts_FX_Movement for FCCS_CTA/FCCS_CICTA. The translation is all set up as YTD including the FX. Has anyone seen this issue or get any suggestions for fixing it ? Thanks