Calculation behavior when Amount Override is Booked

Summary:

Hi all,

I'd like to confirm the expected behavior for FX calculation when an Amount Override is booked.

To start, here’s my current understanding of how FX impact is calculated for standard accounts (i.e., accounts without overrides) during a given period:

FX for Total Cash

FX for Non Cash:

which leads to perfect zero:

Now when there is an override amount booked (same entity but next period):
Total Non Cash

Finding the specific override account

Now I have a variance:

1. Why I don't get the FX on Movement calculated as the normal behavior if I do have Mvt Total in EC?