I don't know how that tiny bead of sensor element that is connected to the rest of the MAF via tiny bare wires will be heat soaked by the outside of the MAF while there is constant air flowing over it inside the intake pipe ….
One way to test this would to have two MAFs, one placed on the engine where it should be, the other kept outside cool. Run the engine hot by idling at high RPM. Note the IAT value report from ECU. Shot down and very quickly replace the MAF with the cool one and very quickly run the engine and get the IAT values. If newly replaced one reports same or very similar it is doing its work as it is designed. There will some lower value due to opening the hood and removing the MAF and etc, but I suspect it will go back to same value before shortly.
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