Seems obvious but one thing I didn't think about mini-splits in a multi zoned installation, a three zone for example, has one compressor unit outdoors that services all three inside units. All three need to be in a compatible mode or they conflict.
An extreme example would be if one is in Heat and one in Cool, the outdoor component can only perform one of those functions at a time. What mine does is sort of a round robin, if they're in the same mode it works like you'd expect, servicing all three simultaneously.
An extreme example would be if one is in Heat and one in Cool, the outdoor component can only perform one of those functions at a time. What mine does is sort of a round robin, if they're in the same mode it works like you'd expect, servicing all three simultaneously.