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Open Studio - VRF unit COP high at lower temp

The default VRF system in open studio is yielding a peak cop at a lower temperature. Is this happening with anyone else; is there a way to resolve this issue? I tried setting the unit at 10 times the capacity which somewhat fixes the issue but not sure why its not working at the capacity needed which is at 72,00 btu/hr cooling and 81,000 btu/hr heating at the values of 4.287 cooling cop and 4.147 heating cop.