FMU Zone volume mismatch

Hello,

I am doing simulation using the Buildings.ThermalZones.EnergyPlus_9_6_0.Examples.SingleFamilyHouse.AirHeating model. Since I am using a different idf file, I changed the the assignment for AFlo and VRoo in the AirHeating model (using the values from my EnergyPlus output file) to reflect the volume that my EnergyPlus model has as shown below

But I am getting the Error:
Zone volume VRoo differs from volume returned by EnergyPlus.
Failed condition: abs(960.74-building_FDD.zon.V) < 0.01

I noticed that this error is specifically with VRoo, so I do not understand why there is discrepancy in the energyplus output file (960.74m3) and what the fmu is returning (422.16m3).

Below are the idf files I tested with. Interesting, the Miami idf file works correctly, but the other two does not, so I do not understand why.

EP_models.zip

I will deeply appreciate any help that can be rendered to resolve this problem.

Start with Buildings.ThermalZones.EnergyPlus_9_6_0.Examples.SingleFamilyHouse.AirHeating and compare the AFlo and VRoo assignments with the IDF files in EP_models.zip. Reproduce the failed volume check and determine why the FMU returns 422.16 m3 instead of the reported 960.74 m3; done means the discrepancy is explained and the affected models behave consistently.