It must be high clock issue on PAHUB. I just tried to hide Wire.setClock(450000) and change the refreshrate of MLX90640 to 4Hz (0x03). It worked well. With PAHUB, it cannot work with high refreshrate (E.g. 8Hz or 16Hz)!!!

MLX90640 doesn't work with PAHUB via M5Fire portA!!!

The following source code works successfully when I connected MLX90640 directly to port A.

Got a black screen while using the following code and a change of connection 'PORT A - PAHUB0 - MLX90640'

I guess it could be a compatible issue between high clock 450kHz and PAHUB.
Any advices???