P4P+ RC loaded with Ver. 1.2.0.0 firmware in RC and Ver. 01.03.0509 firmware in AC?

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Does anyone know if this combination will work at all or is it a combination of firmware that is incompatible? Obviously I don't want to try a combination that may work initially before flight but that will be so unstable when in the air that safe flight is not possible. I am just curious if anyone has run this combination in flight with "normal" responses from the controller being observed. If you look at the "compatibility list" from DJI as to what firmware version in the AC works optimally with what firmware version in the RC and RC+, this combination is not even listed ... so, I am simply asking if anyone has tried it and what the results were.